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Old 09-24-2012, 03:25 AM
Giles Giles is offline
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Join Date: Apr 2004
Location: Newcastle NSW
Posts: 12,854
Originally Posted by al27052 View Post
IIRC, the MRCA (most recent common ancestor) lived around 3000-5000 years ago, give or take. This is the person who was alive, most recently, that all humans are descended from. If a generation is 30 years, that's around 100-150 generations.
200 years ago, the MRCA must have lived at least 8,000-10,000 years ago, since the Tasmanian Aboriginal people were genetically isolated from the rest of the world about 8,000 years ago. I suspect that in 200 years time, the MRCA will be no more than 2,000 years before the present, given the increasing genetic intermingling of previously separated populations.