There is a new estimate for the time that the chromosomal fusion
occurred to create human chr 2 by combining two ape chromosomes. The
fusion obviously occurred after the human lineage separated from the
chimp lineage, but the time range is in the millions of years.
Researchers have been trying to figure out ways to make some reasonable estimate as to when it occurred. Neanderthals have this fusion, so the
fusion likely occurred before the separation of the Neanderthal lineage 500,000 to 800,000 years ago.
Ron O wrote:
There is a new estimate for the time that the chromosomal fusion
occurred to create human chr 2 by combining two ape chromosomes. The
fusion obviously occurred after the human lineage separated from the
chimp lineage, but the time range is in the millions of years.
Researchers have been trying to figure out ways to make some reasonable
estimate as to when it occurred. Neanderthals have this fusion, so the
fusion likely occurred before the separation of the Neanderthal lineage
500,000 to 800,000 years ago.
https://www.thetech.org/ask-a-geneticist/48-46
There's a lot out there that says this could have been more than one event.
That, a mutation where an individual had 47 -- an unmatched pair -- could have existed. If this gets propagated within a group then you can have members with the mutation breeding with members who also have the
mutation, until it's no longer a mutation. Doesn't seem likely though, absent a "Founder Affect," as it would probably be a slight disadvantage, at least at first. Alternatively, Group-A carrying the mutation meets up with Group-B also carrying the mutation.
I like that idea better, because it gives "Humans" twice the starting point...
Of course if something like this is true then molecular dating sucks rocks. The fusion could have gone back millions of years before finally cornering
a population, breaking it off from all the other populations... even if we could date it, we'd just be dating the version from the dominate population, not the oldest.
I *Hate* DNA. Everyone treats it as if it were gospels, but nobody actually knows how to read it. It's excellent at showing us differences, and terrible at trying to work out HOW those differences arose.
There's a point to something JTEM said there: the fusion could have
happened before separation of the chimp and human lineages, just not
having attained a high frequency in the population until later.
John Harshman wrote:
There's a point to something JTEM said there: the fusion could have
happened before separation of the chimp and human lineages, just not
having attained a high frequency in the population until later.
It's more than that, my honey bunches of oats. It's excessively unlikely
that it happened all at once. In all probability it began as 47
chromosomes and only later became 46. The belief is that it's *Oodles*
easier to move from 48 to 47 and then 46, instead of from 48 to 46.
Going from 48 to 47 isn't much of a barrier to breeding with all the 48 >chromosome members of the group, for example. There's no reason why
you can't have both members carrying 47 and 48 chromosomes in the
same population.
On 12/22/22 6:39 PM, JTEM is my hero wrote:
Ron O wrote:
There is a new estimate for the time that the chromosomal fusion
occurred to create human chr 2 by combining two ape chromosomes. The
fusion obviously occurred after the human lineage separated from the
chimp lineage, but the time range is in the millions of years.
Researchers have been trying to figure out ways to make some reasonable
estimate as to when it occurred. Neanderthals have this fusion, so the
fusion likely occurred before the separation of the Neanderthal lineage
500,000 to 800,000 years ago.
https://www.thetech.org/ask-a-geneticist/48-46
There's a lot out there that says this could have been more than one
event.
That, a mutation where an individual had 47 -- an unmatched pair -- could
have existed. If this gets propagated within a group then you can have
members with the mutation breeding with members who also have the
mutation, until it's no longer a mutation. Doesn't seem likely though,
absent
a "Founder Affect," as it would probably be a slight disadvantage, at
least
at first. Alternatively, Group-A carrying the mutation meets up with
Group-B
also carrying the mutation.
I like that idea better, because it gives "Humans" twice the starting
point...
Of course if something like this is true then molecular dating sucks
rocks.
The fusion could have gone back millions of years before finally
cornering
a population, breaking it off from all the other populations... even
if we
could date it, we'd just be dating the version from the dominate
population,
not the oldest.
I *Hate* DNA. Everyone treats it as if it were gospels, but nobody
actually
knows how to read it. It's excellent at showing us differences, and
terrible
at trying to work out HOW those differences arose.
There's a point to something JTEM said there: the fusion could have
happened before separation of the chimp and human lineages, just not
having attained a high frequency in the population until later.
Ron O wrote:
There is a new estimate for the time that the chromosomal fusion
occurred to create human chr 2 by combining two ape chromosomes. The
fusion obviously occurred after the human lineage separated from the
chimp lineage, but the time range is in the millions of years.
Researchers have been trying to figure out ways to make some reasonable
estimate as to when it occurred. Neanderthals have this fusion, so the
fusion likely occurred before the separation of the Neanderthal lineage
500,000 to 800,000 years ago.
https://www.thetech.org/ask-a-geneticist/48-46
There's a lot out there that says this could have been more than one event.
That, a mutation where an individual had 47 -- an unmatched pair -- could have existed. If this gets propagated within a group then you can have members with the mutation breeding with members who also have the
mutation, until it's no longer a mutation. Doesn't seem likely though, absent a "Founder Affect," as it would probably be a slight disadvantage, at least at first. Alternatively, Group-A carrying the mutation meets up with Group-B also carrying the mutation.
I like that idea better, because it gives "Humans" twice the starting point...
Of course if something like this is true then molecular dating sucks rocks. The fusion could have gone back millions of years before finally cornering
a population, breaking it off from all the other populations... even if we could date it, we'd just be dating the version from the dominate population, not the oldest.
I *Hate* DNA. Everyone treats it as if it were gospels, but nobody actually knows how to read it. It's excellent at showing us differences, and terrible at trying to work out HOW those differences arose.
-- --
https://jtem.tumblr.com/post/704349243109949440
John Harshman wrote:
There's a point to something JTEM said there: the fusion could have
happened before separation of the chimp and human lineages, just not
having attained a high frequency in the population until later.
It's more than that, my honey bunches of oats. It's excessively unlikely
that it happened all at once. In all probability it began as 47
chromosomes and only later became 46. The belief is that it's *Oodles*
easier to move from 48 to 47 and then 46, instead of from 48 to 46.
Going from 48 to 47 isn't much of a barrier to breeding with all the 48 chromosome members of the group, for example. There's no reason why
you can't have both members carrying 47 and 48 chromosomes in the
same population.
What you write above is factually correct. However, those facts don't
inform when the chromosome 2 translocation happened.
Using your
words, it's excessively unlikely to have happened after LCA between
H.sapiens and H.neanderthalensis
or before the LCA between chimpanzee and humans.
It's remotely possible there were 46-chromosome
neanderthals and chimpanzee ancestors, but those lineages must have
gone extinct.
The evidence for more than one deleterious step doesn't involve more
than one fusion event because we only have evidence for one fusion
event.
Just because you don't want to understand the DNA evidence doesn't mean
John Harpshman wrote:
You forgot to misspell my name.
Sorry, Don. Won't happen again.
And of course it started with 47.
Undoubtedly, that's how it happened.
Where I was going out on the limb was saying that it happened
more than once. Or, to me it almost seems like it had to. There
were two events, not one, and we became "Fixed" at 46 after
these two (or more) groups joined up for a little horizontal Square
Dancing.
And I know I've talked about this before, the two events, going
back some ways, but I don't think I was clear on the importance,
or on it at all.
You forgot to misspell my name.
And of course it started with 47.
Ron O wrote:
The evidence for more than one deleterious step doesn't involve more
than one fusion event because we only have evidence for one fusion
event.
Yeah, but that's how DNA works.
If there was more than one event, I can't see how we could expect the
two lines to propagate at a 100% equal basis. This never happens in
the case of humans. The smaller group is swamped by the larger group,
or there's a power inequity... something like that. There's no point in making any determination dependent on two equally sized groups
interbreeding in a state of equality.
So, we could just be seeing the molecular dating of the dominant group,
which could be more recent. That's all.
Just because you don't want to understand the DNA evidence doesn't mean
Omg, I keep forgetting that you are SO full of shit...
Going from 48 to 47 shouldn't represent much of an issue, certainly less of an issue than going from 48 to 46. That 46 offspring is going to be dancing alone...
But having 47 chromosomes shouldn't be anywhere near as tough of an issue. The 47 offspring COULD breed. And when you've got people with 47 doing the slip-n-slide with others who have 47, THAT'S the most likely path to
46.
It's the model that works. Period.
48 -> 47 -> 46
The breeding issue is the, um, well it's the issue. But if you have multiple groups
where the 47 is common enough, and they meet, they can start pushing out 46ers
and maybe enough of them so that they don't have to worry about breeding restrictions.
-- --
https://jtem.tumblr.com/post/704315883114364928
Two events aren't required
I don't think there is any importance.
Why does there have to be two fusion events?
Ron O wrote:
Why does there have to be two fusion events?
Why does there have to be one?
Once you agree that it doesn't have to be only one, two seems
like the best model. It doesn't have to be right, but neither does
it have to be wrong, and it seems like a stronger model.
I've argued many, Many, MANY times over the years that once
you establish something has happened, you need a reason to
stop it from happening or, by definition, it will happen again.
It did happen again... if it's possible and there is nothing stopping
it.
John Harshman wrote:
Two events aren't required
Like I said, THAT'S where I wander our on the limb. Saying it was two
events. And that still makes the most sense.
I don't think there is any importance.
Offspring with 46 chromosomes were severely disadvantaged. Offspring with
47, not so much. So to me it seems most likely to get from a mutant to billions of Homo running about with 46 chromosomes is to have TWO or
more populations meet up, each with the 47 thing going on.
Maybe we're into unknown & unknowable territory here but, so what?
Ron O wrote:
Why does there have to be two fusion events?
Why does there have to be one?
Once you agree that it doesn't have to be only one, two seems
like the best model. It doesn't have to be right, but neither does
it have to be wrong, and it seems like a stronger model.
I've argued many, Many, MANY times over the years that once
you establish something has happened, you need a reason to
stop it from happening or, by definition, it will happen again.
It did happen again... if it's possible and there is nothing stopping
it.
-- --
https://jtem.tumblr.com/post/149095877458
That just isn't true. Offspring with 46 chromosomes are at no
disadvantage.
Events of the type represented by the human chromosome 2 translocation
are rare.
For two of these rare events to happen sufficiently close
in time and space to eventually merge to 46 chromosomes is possible,
in the sense that the laws of physics allow it, but is extremely
improbable, especially within small isolated populations.
The
mechanism that you previously noted is far more probable and IIUC has
been documented in other species; a single chromosome translocation in
a population of individuals with N chromosomes, followed by the
reproduction of multiple N-1 chromosome offspring, followed by pairs
of N-1 chromosome individuals reproducing N-2 chromosome offspring.
Snip
You didn't
There
was one, not two or none. It doesn't matter whether the designer did it
or not, there was obviously a chromosome fusion event. These things
happen. Around 1 in 2000 people wandering around today have structural chromosomal mutations like translocations inversions and duplication/deletions. These things have already happened and they keep happening.
The problem is that you can't keep it from happening.
Do you consider that a serious response? Do you really think it's the chromosome count that's the problem there?
John Harshman wrote:
That just isn't true. Offspring with 46 chromosomes are at no
disadvantage.
Sure. Go reproduce with a Chimp.
John Harshmin wrote:
Do you consider that a serious response? Do you really think it's the
chromosome count that's the problem there?
Yeah, I'm the one who invented the idea that the chromosome fusion
was a barrier to reproduction. That was me. All the cites you can
find talking about it? All me. It was very clever of you to note this
fact, introduce it as your "Argument." Very clever, indeed. And I'm not
being the least bit sarcastic.
Well. Maybe just a little.
JTEM is my hero wrote:
Yeah, I'm the one who invented the idea that the chromosome fusion
was a barrier to reproduction. That was me. All the cites you can
find talking about it? All me. It was very clever of you to note this
fact, introduce it as your "Argument." Very clever, indeed. And I'm not being the least bit sarcastic.
Well. Maybe just a little.
Well, when sarcasm is
The fact is that (as Ron O. has tried to explain to you
John Harkman wrote:
JTEM is my hero wrote:
Yeah, I'm the one who invented the idea that the chromosome fusion
was a barrier to reproduction. That was me. All the cites you can
find talking about it? All me. It was very clever of you to note this
fact, introduce it as your "Argument." Very clever, indeed. And I'm not
being the least bit sarcastic.
Well. Maybe just a little.
Well, when sarcasm is
Wow. Doubling Down on your stupidity. i am so shocked oh my gosh i
can't believe it no way this has never happened before oh my.
(That was more sarcasm, btw)
The fact is that (as Ron O. has tried to explain to you
And your lack of reading comprehension!
In this one thread such an event was impossibly rare and could never
happen twice AND oh so common. In both cases the point was to
disagree with me, not stick to what is at issue. And what is at issue?
Now a mutation, and exception, came to be the norm.
And this Harpmen sock puppet? You're even pretending that I invented
the notion that the chromosome fusion would be a barrier to
reproduction (with those who lack it).
I invented it. All me. My idea. Never before seen or heard before me, here and now. AND YOU'RE DOUBLING DOWN, you're such a disgrace!
There's science and then there's emotional problems. You have emotional problems. Lots.
Ron O wrote:
Snip
Oh, the freudian thing again...
It's too late now. If dad was going to castrate you it would already
be gone...
You didn't
Jesus Christ! You play this fool well...
There
was one, not two or none. It doesn't matter whether the designer did it
or not, there was obviously a chromosome fusion event. These things
happen. Around 1 in 2000 people wandering around today have structural
chromosomal mutations like translocations inversions and
duplication/deletions. These things have already happened and they keep
happening.
That's the point. But offspring with 46 chromosomes is unlikely to have
been able to reproduce with members of the population with 48. So we're talking about how it went from 48 to 46.
The problem is that you can't keep it from happening.
That's not the problem, no.
The problem isn't that mutations happen. The problem is coming up with
a model that best provides for a mutation coming to typify a population.
-- --
https://jtem.tumblr.com/tagged/hello%20kitty
Isn't it sad that what you snipped
What type of
What you have just snipped
Ron O wrote:
Isn't it sad that what you snipped
No. You weren't using them anyway.
And, again, it's not about mutations. It's not about chromosome
fusions. It's about how an anomaly became the norm.
What type of
Nope. Didn't work. It's still about how an anomaly became the
norm.
What you have just snipped
Those little raisins weren't doing anything...
And keep in mind: You're supposed to be DIFFERENT people!
You're pretending that there's a vast conspiracy here, where
years -- GENERATIONS -- of sources talking about the change
in chromosome count being a barrier to interbreeding were
all created in an attempt to hide the fact that I only just now
invented the idea.
-- --
https://jtem.tumblr.com/post/704331147857051648
Well, one can at least hope
I see that you have snipped
What was keeping it from becoming the norm. What
Ron O wrote:
I see that you have snipped
No. You castrated yourself.
What was keeping it from becoming the norm. What
So you're BOTH claiming that these types of mutations happen
all the time AND that we've been fixed with 46 Chromosomes
being the norm since before the emergence of our species...
Hmm.
AND you're pretending that this is settled, that I made up the
idea that the Chromosome thingy is a barrier to reproduction.
I headed a VAST conspiracy to fake generations of cites
taking about this, all to hide the fact that I only just made it up
now.
Damn. If you are a seriously deranged sock puppet.
-- --
https://jtem.tumblr.com/post/704349243109949440
On 12/24/22 8:44 AM, JTEM is my hero wrote:
John Harshmin wrote:
Do you consider that a serious response? Do you really think it's the
chromosome count that's the problem there?
Yeah, I'm the one who invented the idea that the chromosome fusion
was a barrier to reproduction. That was me. All the cites you can
find talking about it? All me. It was very clever of you to note this
fact, introduce it as your "Argument." Very clever, indeed. And I'm not
being the least bit sarcastic.
Well. Maybe just a little.
Well, when sarcasm is your only tool, I suppose that's what you have to
use. The fact is that (as Ron O. has tried to explain to you a few times >now),
the problem with chromosome fusions lies with meiosis in
heterozygotes, in which there can be problems in forming gametes, though >with only minor effects on fecundity. But that's exactly the "barrier to >reproduction" you're talking about. It's the same barrier whether the >heterozygote goes only to mate with an individual having 46, 47, or 48 >chromosomes. The sole effect is during meiosis in gametogenesis.
There is of course no such problem with homozygotes, regardless of
whether they have 48 or 46 chromosomes. And mitosis is no difficulty at
all. The result of a mating between 48-chromosome and 46-chromosome >individuals would just be all 47-chromosome heterozygotes, with no
reduced fecundity.
On Sat, 24 Dec 2022 09:15:23 -0800, John Harshman
<john.harshman@gmail.com> wrote:
On 12/24/22 8:44 AM, JTEM is my hero wrote:
John Harshmin wrote:
Do you consider that a serious response? Do you really think it's the
chromosome count that's the problem there?
Yeah, I'm the one who invented the idea that the chromosome fusion
was a barrier to reproduction. That was me. All the cites you can
find talking about it? All me. It was very clever of you to note this
fact, introduce it as your "Argument." Very clever, indeed. And I'm not
being the least bit sarcastic.
Well. Maybe just a little.
Well, when sarcasm is your only tool, I suppose that's what you have to
use. The fact is that (as Ron O. has tried to explain to you a few times
now),
Not just Ron O.
the problem with chromosome fusions lies with meiosis in
heterozygotes, in which there can be problems in forming gametes, though
with only minor effects on fecundity. But that's exactly the "barrier to
reproduction" you're talking about. It's the same barrier whether the
heterozygote goes only to mate with an individual having 46, 47, or 48
chromosomes. The sole effect is during meiosis in gametogenesis.
There is of course no such problem with homozygotes, regardless of
whether they have 48 or 46 chromosomes. And mitosis is no difficulty at
all. The result of a mating between 48-chromosome and 46-chromosome
individuals would just be all 47-chromosome heterozygotes, with no
reduced fecundity.
JTEM did raise a point worth mentioning, that many people think the
human chromosome 2 translocation was responsible for creating
H.sapiens. In fact, it had almost nothing to do with it.
JTEM did raise a point worth mentioning, that many people think the
human chromosome 2 translocation was responsible for creating
H.sapiens. In fact, it had almost nothing to do with it.
You seem to be talking to yourself
The estimated time of the fusion is around 800,000 years ago
On 12/24/22 4:04 PM, jillery wrote:
On Sat, 24 Dec 2022 09:15:23 -0800, John Harshman
<john.harshman@gmail.com> wrote:
On 12/24/22 8:44 AM, JTEM is my hero wrote:
John Harshmin wrote:
Do you consider that a serious response? Do you really think it's the >>>>> chromosome count that's the problem there?
Yeah, I'm the one who invented the idea that the chromosome fusion
was a barrier to reproduction. That was me. All the cites you can
find talking about it? All me. It was very clever of you to note this
fact, introduce it as your "Argument." Very clever, indeed. And I'm not >>>> being the least bit sarcastic.
Well. Maybe just a little.
Well, when sarcasm is your only tool, I suppose that's what you have to
use. The fact is that (as Ron O. has tried to explain to you a few times >>> now),
Not just Ron O.
We don't actually know that. Conceivably, there's something about itthe problem with chromosome fusions lies with meiosis in
heterozygotes, in which there can be problems in forming gametes, though >>> with only minor effects on fecundity. But that's exactly the "barrier to >>> reproduction" you're talking about. It's the same barrier whether the
heterozygote goes only to mate with an individual having 46, 47, or 48
chromosomes. The sole effect is during meiosis in gametogenesis.
There is of course no such problem with homozygotes, regardless of
whether they have 48 or 46 chromosomes. And mitosis is no difficulty at
all. The result of a mating between 48-chromosome and 46-chromosome
individuals would just be all 47-chromosome heterozygotes, with no
reduced fecundity.
JTEM did raise a point worth mentioning, that many people think the
human chromosome 2 translocation was responsible for creating
H.sapiens. In fact, it had almost nothing to do with it.
that's important. But it does seem unlikely.
Ron O wrote:
You seem to be talking to yourself
Which is weird. Because if there is anyone here other than another
sock puppet of your's reading this, and they are too stupid to see
what you're doing, what you always do, you already fooled them.
There's no point in continuing. And if you haven't fooled them, well,
you just keep digging the hole deeper & deeper...
The estimated time of the fusion is around 800,000 years ago
I don't buy into molecular dating at all. Are you claiming that they retrieved DNA from a fossil of 800,000 years in age or is your
statement predicated in the fantasy of molecular dating?
And dating is irrelevant anyways. Even if there were such a thing
as molecular dating, it is just as likely telling us the most recent
time a fusion occurred, not the first. Or it could be telling us the
first -- we'd literally have no way of knowing. So it's irrelevant.
Remember: You DO claim that such mutations are common! And
that because they're so common it couldn't happen more than
once... because that would require them to be common, which you
say they are... and are not.
Here. You in one of your many different mental states "Arguing"
that it was too common to happen more than once:
: These things happen. Around 1 in 2000 people wandering around
: today have structural chromosomal mutations like translocations
: inversions and duplication/deletions. These things have already
: happened and they keep happening.
Oo! And then there's your free-fall fantasy concerning the VAST
internet conspiracy, as well as time travel. This is how I could invent
the notion that the chromosome fusion could be a barrier to
interbreeding -- and genetic wall of isolation -- right here and right
now, AND there can be cites going back many years all talking
about the same thing.
Are you autistic? Is this why you see this black & white world where
one answer is 10 hundred million percent correct and agreed upon,
and the more common answer doesn't exist?
Man, you are 10 shades of screwed...
Merry Christmas!
-- --
https://jtem.tumblr.com/post/704216412103884800
On 12/24/22 11:29 PM, jillery wrote:
On Sat, 24 Dec 2022 17:39:40 -0800, John Harshman
<john.harshman@gmail.com> wrote:
On 12/24/22 4:04 PM, jillery wrote:
On Sat, 24 Dec 2022 09:15:23 -0800, John Harshman
<john.harshman@gmail.com> wrote:
On 12/24/22 8:44 AM, JTEM is my hero wrote:
John Harshmin wrote:
Do you consider that a serious response? Do you really think it's the >>>>>>> chromosome count that's the problem there?
Yeah, I'm the one who invented the idea that the chromosome fusion >>>>>> was a barrier to reproduction. That was me. All the cites you can
find talking about it? All me. It was very clever of you to note this >>>>>> fact, introduce it as your "Argument." Very clever, indeed. And I'm not >>>>>> being the least bit sarcastic.
Well. Maybe just a little.
Well, when sarcasm is your only tool, I suppose that's what you have to >>>>> use. The fact is that (as Ron O. has tried to explain to you a few times >>>>> now),
Not just Ron O.
No reply. Quelle surprise.
I don't believe you actually did explain how chromosomal fusions affect >reproduction. Perhaps I missed it. But you should definitely get over >yourself.
We don't actually know that. Conceivably, there's something about itthe problem with chromosome fusions lies with meiosis in
heterozygotes, in which there can be problems in forming gametes, though >>>>> with only minor effects on fecundity. But that's exactly the "barrier to >>>>> reproduction" you're talking about. It's the same barrier whether the >>>>> heterozygote goes only to mate with an individual having 46, 47, or 48 >>>>> chromosomes. The sole effect is during meiosis in gametogenesis.
There is of course no such problem with homozygotes, regardless of
whether they have 48 or 46 chromosomes. And mitosis is no difficulty at >>>>> all. The result of a mating between 48-chromosome and 46-chromosome
individuals would just be all 47-chromosome heterozygotes, with no
reduced fecundity.
JTEM did raise a point worth mentioning, that many people think the
human chromosome 2 translocation was responsible for creating
H.sapiens. In fact, it had almost nothing to do with it.
that's important. But it does seem unlikely.
I suppose you're right, if you mean "We don't actually know" in the
same sense as "We weren't there".
This topic reprises the same issues discussed in a recent SBP thread,
which you also conveniently ignored. Similar methods which date when
human chromosome 2 fused, also date when various lineages diverged
from modern humans. My understanding is none of those divergences
correlate with that fusion event. This doesn't inform whether that
fusion event caused some feature we modern humans have, but biological
isolation isn't one of them.
There is ambiguity regarding what "H. sapiens" means. Some people still >consider neandertals and denisovans "archaic H. sapiens". Biological >isolation isn't really the question here.
On Sat, 24 Dec 2022 17:39:40 -0800, John Harshman
<john.harshman@gmail.com> wrote:
On 12/24/22 4:04 PM, jillery wrote:
On Sat, 24 Dec 2022 09:15:23 -0800, John Harshman
<john.harshman@gmail.com> wrote:
On 12/24/22 8:44 AM, JTEM is my hero wrote:
John Harshmin wrote:
Do you consider that a serious response? Do you really think it's the >>>>>> chromosome count that's the problem there?
Yeah, I'm the one who invented the idea that the chromosome fusion
was a barrier to reproduction. That was me. All the cites you can
find talking about it? All me. It was very clever of you to note this >>>>> fact, introduce it as your "Argument." Very clever, indeed. And I'm not >>>>> being the least bit sarcastic.
Well. Maybe just a little.
Well, when sarcasm is your only tool, I suppose that's what you have to >>>> use. The fact is that (as Ron O. has tried to explain to you a few times >>>> now),
Not just Ron O.
No reply. Quelle surprise.
We don't actually know that. Conceivably, there's something about itthe problem with chromosome fusions lies with meiosis in
heterozygotes, in which there can be problems in forming gametes, though >>>> with only minor effects on fecundity. But that's exactly the "barrier to >>>> reproduction" you're talking about. It's the same barrier whether the
heterozygote goes only to mate with an individual having 46, 47, or 48 >>>> chromosomes. The sole effect is during meiosis in gametogenesis.
There is of course no such problem with homozygotes, regardless of
whether they have 48 or 46 chromosomes. And mitosis is no difficulty at >>>> all. The result of a mating between 48-chromosome and 46-chromosome
individuals would just be all 47-chromosome heterozygotes, with no
reduced fecundity.
JTEM did raise a point worth mentioning, that many people think the
human chromosome 2 translocation was responsible for creating
H.sapiens. In fact, it had almost nothing to do with it.
that's important. But it does seem unlikely.
I suppose you're right, if you mean "We don't actually know" in the
same sense as "We weren't there".
This topic reprises the same issues discussed in a recent SBP thread,
which you also conveniently ignored. Similar methods which date when
human chromosome 2 fused, also date when various lineages diverged
from modern humans. My understanding is none of those divergences
correlate with that fusion event. This doesn't inform whether that
fusion event caused some feature we modern humans have, but biological isolation isn't one of them.
We both
Demonstrate that
snip
We only have evidence of one fusion event creating human chromosome 2.
This is cytological evidence from 1982.
WIKI entry:
It probably wasn't the first fusion event in the human lineage, but for
the creation of chromosome 2 it was the one fusion event that managed to
be fixed in the population that became modern humans
Remember: You DO claim that such mutations are common! And
that because they're so common it couldn't happen more than
once... because that would require them to be common, which you
say they are... and are not.
Yes, they are common
Ron O wrote:
We both
So let's recap:
You are that such mutations are far too common to happen more than once,
AND that I invented the notion that the drop to 46 chromosome was a likely barrier to interbreeding, a form of genetic isolation. I someone undertook a vast conspiracy where I wrote & backdates the countless cites talking about this.
This is pretty typical of you, wilding flailing about, gushing ANYTHING as a rationalization, grepping for any excuse to claim you oppose something...
Demonstrate that
: These things happen. Around 1 in 2000 people wandering around
: today have structural chromosomal mutations like translocations
: inversions and duplication/deletions. These things have already
: happened and they keep happening.
That's you! That's you "Arguing" that there could only ever be a single event... Sheesh!
snip
Your junk was long gone before I said anything.
But I love this OTHER conspiracy theory, the one where a operate a
nefarious cancel bot, merely to transform you Nobel Prize winning
papers into butt of jokes....
We only have evidence of one fusion event creating human chromosome 2.
Great. The whole point is HOW we dropped from 48 to 46. It's about creating
a model where this can happen, and is a better model than others.
This is cytological evidence from 1982.
As usual, you post a URL and then demand that everybody else guess as what you mean. If you find a quote in there that you feel supports a particular view,
quote it. Explain what you believe it supports, and why.
This isn't hard. You are pretending to have read it, and understood it AND that
it supports a position you are holding. Yet, as always, you are incapable of saying WHY.
WIKI entry:
Wiki isn't a cite. It can be used to establish that, yes, an idea is out there, it's
not just you, but it's dominated by a very small number of dogmatic trolls.
It probably wasn't the first fusion event in the human lineage, but for
the creation of chromosome 2 it was the one fusion event that managed to
be fixed in the population that became modern humans
We are talking about how. And, yes, I do believe believe the "How" is best explained by two events, not one. The mutation popped up in two or more populations.. probably a mutation were instead of a matched pair of 48 or
46 they carried 47. Not everyone. Maybe not even most.
Remember: You DO claim that such mutations are common! And
that because they're so common it couldn't happen more than
once... because that would require them to be common, which you
say they are... and are not.
Yes, they are common
So we are agreed: "They are so common that they could never happen
more than once."
THAT is your "Argument" <cough> <cough> <cough>
Oh. And your castration complex:
https://dictionary.apa.org/castration-complex
Trust me, sugar lumps. I never touched your jewels. They were already
gone. So no more talk about me giving you the snip.
-- --
https://jtem.tumblr.com/post/704660666718502912
On 12/26/2022 3:41 PM, JTEM is my hero wrote:
Ron O wrote:
We both
So let's recap:
You are that such mutations are far too common to happen more than once,
AND that I invented the notion that the drop to 46 chromosome was a
likely
barrier to interbreeding, a form of genetic isolation. I someone
undertook a
vast conspiracy where I wrote & backdates the countless cites talking
about
this.
This is pretty typical of you, wilding flailing about, gushing
ANYTHING as a
rationalization, grepping for any excuse to claim you oppose something...
Demonstrate that
: These things happen. Around 1 in 2000 people wandering around
: today have structural chromosomal mutations like translocations
: inversions and duplication/deletions. These things have already
: happened and they keep happening.
That's you! That's you "Arguing" that there could only ever be a single
event... Sheesh!
snip
Your junk was long gone before I said anything.
But I love this OTHER conspiracy theory, the one where a operate a
nefarious cancel bot, merely to transform you Nobel Prize winning
papers into butt of jokes....
We only have evidence of one fusion event creating human chromosome 2.
Great. The whole point is HOW we dropped from 48 to 46. It's about
creating
a model where this can happen, and is a better model than others.
This is cytological evidence from 1982.
As usual, you post a URL and then demand that everybody else guess as
what
you mean. If you find a quote in there that you feel supports a
particular view,
quote it. Explain what you believe it supports, and why.
This isn't hard. You are pretending to have read it, and understood it
AND that
it supports a position you are holding. Yet, as always, you are
incapable of
saying WHY.
WIKI entry:
Wiki isn't a cite. It can be used to establish that, yes, an idea is
out there, it's
not just you, but it's dominated by a very small number of dogmatic
trolls.
It probably wasn't the first fusion event in the human lineage, but for
the creation of chromosome 2 it was the one fusion event that managed to >>> be fixed in the population that became modern humans
We are talking about how. And, yes, I do believe believe the "How" is
best
explained by two events, not one. The mutation popped up in two or more
populations.. probably a mutation were instead of a matched pair of 48 or
46 they carried 47. Not everyone. Maybe not even most.
Remember: You DO claim that such mutations are common! And
that because they're so common it couldn't happen more than
once... because that would require them to be common, which you
say they are... and are not.
Yes, they are common
So we are agreed: "They are so common that they could never happen
more than once."
THAT is your "Argument" <cough> <cough> <cough>
Oh. And your castration complex:
https://dictionary.apa.org/castration-complex
Trust me, sugar lumps. I never touched your jewels. They were already
gone. So no more talk about me giving you the snip.
A lot of snipping and running, but not much else.
On 12/26/22 6:04 PM, RonO wrote:
On 12/26/2022 3:41 PM, JTEM is my hero wrote:
Ron O wrote:
We both
So let's recap:
You are that such mutations are far too common to happen more than once, >> AND that I invented the notion that the drop to 46 chromosome was a
likely
barrier to interbreeding, a form of genetic isolation. I someone
undertook a
vast conspiracy where I wrote & backdates the countless cites talking
about
this.
This is pretty typical of you, wilding flailing about, gushing
ANYTHING as a
rationalization, grepping for any excuse to claim you oppose something... >>
Demonstrate that
: These things happen. Around 1 in 2000 people wandering around
: today have structural chromosomal mutations like translocations
: inversions and duplication/deletions. These things have already
: happened and they keep happening.
That's you! That's you "Arguing" that there could only ever be a single
event... Sheesh!
snip
Your junk was long gone before I said anything.
But I love this OTHER conspiracy theory, the one where a operate a
nefarious cancel bot, merely to transform you Nobel Prize winning
papers into butt of jokes....
We only have evidence of one fusion event creating human chromosome 2.
Great. The whole point is HOW we dropped from 48 to 46. It's about
creating
a model where this can happen, and is a better model than others.
This is cytological evidence from 1982.
As usual, you post a URL and then demand that everybody else guess as
what
you mean. If you find a quote in there that you feel supports a
particular view,
quote it. Explain what you believe it supports, and why.
This isn't hard. You are pretending to have read it, and understood it
AND that
it supports a position you are holding. Yet, as always, you are
incapable of
saying WHY.
WIKI entry:
Wiki isn't a cite. It can be used to establish that, yes, an idea is
out there, it's
not just you, but it's dominated by a very small number of dogmatic
trolls.
It probably wasn't the first fusion event in the human lineage, but for >>> the creation of chromosome 2 it was the one fusion event that managed to >>> be fixed in the population that became modern humans
We are talking about how. And, yes, I do believe believe the "How" is
best
explained by two events, not one. The mutation popped up in two or more
populations.. probably a mutation were instead of a matched pair of 48 or >> 46 they carried 47. Not everyone. Maybe not even most.
Remember: You DO claim that such mutations are common! And
that because they're so common it couldn't happen more than
once... because that would require them to be common, which you
say they are... and are not.
Yes, they are common
So we are agreed: "They are so common that they could never happen
more than once."
THAT is your "Argument" <cough> <cough> <cough>
Oh. And your castration complex:
https://dictionary.apa.org/castration-complex
Trust me, sugar lumps. I never touched your jewels. They were already
gone. So no more talk about me giving you the snip.
A lot of snipping and running, but not much else.It may be time to stop feeding the troll.
It may be time to stop feeding the troll.
snipping
Ron O wrote:
snipping
Ah, the freud thing again... you never had any to snip off!
So let's recap:
Such mutations happen all the time, according to you, they're
far too common to appear in one than once group. It's
impossible.
AND, I made up the idea that the chromosome count, our 46
compared to the 48 of great apes, could be a barrier to
interbreeding... I invented the notion... just sort of pulled it out
of thin air, and created the countless cites talking about it to
conceal what i had done... even backdating many of them.
Wow. You are ten shades of FUCKED UP. But, par for the course.
You are this way. Doesn't matter the sock puppet you cower
behind, you're always just as stupid.
-- --
https://jtem.tumblr.com/post/704660666718502912
On 12/27/2022 2:21 PM, JTEM is my hero wrote:
Ron O wrote:
snipping
Ah, the freud thing again... you never had any to snip off!
It doesn't matter who said what. What matters is what you do.
Ron Okimoto
So let's recap:
Such mutations happen all the time, according to you, they're
far too common to appear in one than once group. It's
impossible.
What a loser. What you snipped and ran from just stated the simple fact >that we do not have evidence for more than one fusion event. Lying
about the information that has been given to you repeatedly is just lame
and stupid as well as dishonest.
AND, I made up the idea that the chromosome count, our 46
compared to the 48 of great apes, could be a barrier to
interbreeding... I invented the notion... just sort of pulled it out
of thin air, and created the countless cites talking about it to
conceal what i had done... even backdating many of them.
Wow. You are ten shades of FUCKED UP. But, par for the course.
You are this way. Doesn't matter the sock puppet you cower
behind, you're always just as stupid.
This is what snipping and running comes to. You can remain willfully >ignorant of what has been discussed, but you could just go back up the >thread and see what actually happened.
It doesn't matter who said what.
you snipped
This is what snipping
Think YASMA. It's what JTEM do.
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