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Author Topic:   All Human Beings Are Descendants of Adam
Dr Jack
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Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 8.7


Message 10 of 118 (606382)
02-25-2011 9:03 AM
Reply to: Message 1 by Europa
02-25-2011 2:56 AM


Others have dealt with the rest, I'm just going to concentrate on this one bit:
Having said that, we also have done some tests, because of which we have found out that the existing population of the world are all decendants of a single human being
This is incorrect. No-one has ever performed a test for the existence of mitochondrial eve. Her existence is assumed based on the statistical near inevitability of it being so. What they then did have assumed she existed is apply the science of genetic molecular clocks to the data gathered on variation in mitochondiral genomes across the human population to calculate when she lived.

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Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 8.7


Message 18 of 118 (606394)
02-25-2011 9:53 AM
Reply to: Message 13 by Europa
02-25-2011 9:31 AM


Yes. Both use a fundamentally similar methodology.

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Dr Jack
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Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 8.7


Message 20 of 118 (606397)
02-25-2011 9:55 AM
Reply to: Message 17 by Europa
02-25-2011 9:47 AM


But even "all the knowledge we have" today about ME and YcAdam cannot be considered sound knowledge. Isn't the knowldge we have about ME and YcA pretty primitive?
No, not really; I mean the calibration could be better, and we could collect more data but what we have is well supported.
One thing that would indicate that our methods are fundamentally flawed is if YcA and ME came out as living at the same time or if YcA lived before ME.

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Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 8.7


Message 22 of 118 (606400)
02-25-2011 9:59 AM
Reply to: Message 19 by Europa
02-25-2011 9:55 AM


No. At most we could share a ME who isn't human. In theory we could trace that ME right back to the dawnings of sexual reproduction but the odds against that are so high as to mean it's practically certain not to be the case.

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Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 8.7


Message 32 of 118 (606529)
02-26-2011 5:43 AM
Reply to: Message 28 by NoNukes
02-25-2011 10:31 PM


NoNukes writes:
You are overstating the uniqueness of ME. ME is merely the most recently born ancestor of all of us.
No she's not! She's not even the most recent female common ancestor. She's the most recent common ancestor if you trace exclusively down the female line.
(And, by-the-by, it's likely that even that's not strictly true because while mitochondria is inherited from the mother in >99.99% of cases, it's quite probably that in a few cases in the last 200 thousand years there have been people who inherited mitochondria from their father).

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Dr Jack
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Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 8.7


Message 43 of 118 (606770)
02-28-2011 10:26 AM
Reply to: Message 30 by bluescat48
02-26-2011 1:31 AM


bluescat48 writes:
Except that mitochondrial eve lived at least 70000 years before the so called biblical eve would have lived.
And, if the mtEve date was ~6000 years ago, that would also disprove the Genesis account because she should post-date the flood, rather than being the garden of Eden Eve.

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Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 8.7


Message 48 of 118 (606788)
02-28-2011 11:49 AM
Reply to: Message 45 by NoNukes
02-28-2011 11:00 AM


Re: Not a problem
NoNukes writes:
Not so. As long as more than one woman survived the flood, it is not necessary for mitochondrial Eve to be a post-flood woman.
Unless the women were completely separated into four populations (and, ouch, the inbreeding implications of that!) it's mind-boggling unlikely that even if all the women present had different mitochondrial genomes (itself relatively unlikely) all four lines would have survived to the current day.

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Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 8.7


Message 71 of 118 (607109)
03-02-2011 3:58 AM
Reply to: Message 68 by Taq
03-01-2011 3:50 PM


Taq writes:
For 23 pairs of chromosomes the chances of this occurring are 1 in 2^23 or about 1 in 8 million. It is the same odds of flipping tails 23 times in a row.
It's worse than that, because chromosomes undergo crossing-over during meiosis so chromosomes inherited from both parent are mixed together before being passed on.

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Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 8.7


Message 73 of 118 (607111)
03-02-2011 5:05 AM
Reply to: Message 72 by Wounded King
03-02-2011 4:08 AM


Apologies, I missed this link.

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