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Author Topic:   Genetic 'Bottlenecks' and the Flood
Dr Adequate
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Posts: 16111
Joined: 07-20-2006


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Message 56 of 59 (671856)
08-30-2012 10:41 PM


Bump For Foreveryoung
This seems a better thread then the one on chromosome 2 to discuss fey's question.

Edited by Dr Adequate, : No reason given.


  
Dr Adequate
Member
Posts: 16111
Joined: 07-20-2006


(1)
Message 58 of 59 (671858)
08-30-2012 10:55 PM


Answer For FEY
I've been looking around for answers to fey's question. One relevant paper would seem to be Francisco J. Ayala, Ananias Escalante, Colm O'hUigin and Jan Klein, "Molecular Genetics of Speciation and Human Origins," Proc. Natl. Acad. Sci, USA, 91: pp6787-6794, July 1994, p. 6787-6788. Addresssing the question of whether there was a bottleneck 100,000-200,000 years ago, they calculate from the present level of heterozygosity that there can't have been fewer than 4000 breeding individuals at that time.

Now the effective population would have to be larger the closer in time the bottleneck was, so if we put it at a mere ~4000 years ago, it would have to be so large it would hardly be a bottleneck at all ... certainly not as small as 8 people.

Edited by Dr Adequate, : No reason given.


  
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