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Old 04-15-2006, 10:13 PM   #16
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Quote:
Originally posted by STING2


Genetic markers relevant to determining ones ancestry. Sorry I did not use the correct terminology but I think its generally understood that were discussing determining ethnic ancestry in this thread.
That's fine, I just thought that's where some of the confusion like this:

Quote:
wouldn't it be awfully unlikely that you would still have 15% of your genes from an ancestor 15,000 years back? It seems to me the ancestor would likely be more along the lines of a great-grandparent...
might have come from.
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Old 04-16-2006, 02:02 AM   #17
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Quote:
Originally posted by anitram


That's fine, I just thought that's where some of the confusion like this:



might have come from.
Their refering to the 175 markers on the test relevant to determining ancestry, not the persons entire genome.
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Old 04-16-2006, 10:55 AM   #18
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Quote:
Originally posted by anitram
Not necessarily true. Race has both a social and a biological component.

Genetically speaking, you can look at markers such as sickle cell anemia or malaria resistance (in black populations) or the prevalence of Tay-Sachs (in Jewish populations), etc. and see that within a race or an ethnicity there are certain genetic predispositions.
As I put it, race is and isn't important. It isn't important when you look at the larger scheme of things, but, as I see it, it is important in that, had humanity remained a group of genetically isolated populations over the very long term, we probably would have created different species of humans.

But 75,000 years is long enough to make some genetic differences--like you've mentioned--but certainly not long enough to make us that much different overall.

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