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So are you saying that if we did the same analysis across Africa, you'd find the same markers throughout the populations in "near-perfect correspondence" for pe

by huxley 15y ago

So are you saying that if we did the same analysis across Africa, you'd find the same markers throughout the populations in "near-perfect correspondence" for people self-identifying racially as African? Or is this specific to the populations you studied in the United States?

barry-cotter 15y ago
Dude, I didn't do the study. Re: Sub Saharan Africans you can get a decent idea if someone has such ancestry from one allele. As one example, the Duffy Null allele (FY0) has a frequency of almost 100% of Sub-Saharan Africans, but occurs very infrequently in populations outside of this region. A person having this gene is thus more likely to have Sub-Saharan African ancestors.* http://en.wikipedia.org/wiki/Ancestry-informative_marker http://en.wikipedia.org/wiki/Ancestry-informative_marker Obviously the more such alleles you test for the better you'll be able to distinguish the populations. This page gives links to ~300 AIMs which allow you to distinguish ancestry pretty well within Europe. http://www.snpedia.com/index.php/Ancestry_Informative_Marker http://www.snpedia.com/index.php/Ancestry_Informative_Marker Given that that's possible distinguishing continental ancestry seems to be a problem of application not theory.