tarchon
First Post
You're thinking about mitochondrial DNA (and it shows up to a lesser extent in Y chromosomes). That's a whole different animal (possibly in the literal sense as well...), because of the lack of recombination. As you'll see in the article I linked to (and has been widely known for decades), the alleged "racial" correlations in nuclear DNA polymorphisms are negligible compared to individual variations and they really have not turned out to correspond at all well to the clamoring and competing mass of traditional theories of race based on morphology. "Face morphology" is the same sort of fuzzy evidence that Blumenbach used. It was state of the art in the 18th century. We now, 200+ years later, know that morphology doesn't work very well for trying to develop such overarching concepts of human variation. The whole nonsense over Kennewick Man's supposed "Caucasian" features are symptomatic of that.Turjan said:I think, you can either use morphological or genetical approaches. If you look at face morphology, you will see that Ethiopians don't differ from other Caucasians, it's just a dark skin colour.
The genetical approach is much easier. I think, most researchers agree on the African origin of the human species. Because the African continent has harboured humans for the longest time of all continents, Africans (as a race, i.e. referring to black people) are genetically very diverse. They would qualify as several different race groups. Caucasians on the other hand are genetically nearly identical. This reflects the relatively short time of their development from one single ancestor group. Asians are genetically closely related to Caucasians. The genetical difference between Asians and Caucasians is negligible compared to the large variety among African peoples.
Btw., genetically Ethiopians are about an even mix of Caucasian and Negroid genes. This means, you can place them into both groups, if you so desire.
I agree that you can take some arbitrary set of obscure morphological measurements and say "this type we'll call 'Caucasoid' and this type we'll call 'Negroid'" but all you've done there is to show that you can pick basis vectors to span a vector space. It's just a bit of numerical hocus-pocus to thrill the mathematically naive.
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