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Ancient admixture into Africa from the ancestors of non-Africans
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[QUOTE]Originally posted by Ish Geber: [QB] [QUOTE]Originally posted by Elmaestro: [qb] [b]We find evidence for substantial migration from the ancestors of present-day Eurasians into African groups between 40 and 70 thousand years ago, predating the divergence of Eastern and Western Eurasian lineages. [/b] This is very very poor wording. Anywho, ....so who's still looking forward to physical Basal Eurasians? Anybody? [/qb][/QUOTE]What confuses me about these admixture claims, is that populations back then consisted out of very small pockets (max 100 people). And ever thing was done by foot over extremely long distance. Chances for one group to have encountered another group of people seems highly unlikely to me. And yeah you can apply a Bayesian model on that one as well. I wonder why the authors didn't show the actual migration and industry relating to this migration route or routes. [QUOTE]Originally posted by Doug M: [qb] For this to even make sense there would have to be some genes that arose specifically outside of Africa after the Africans left. And those genes would have had to dominate the entire sub-group of Africans, or as they call them Eurasians, in order to make them a separate genetic lineage from the Africans who stayed behind. Something like that is going to depend primarily on theories of Neanderthal mixture because there is no scenario of populations leaving Africa and suddenly having non African genes to go back and deposit back into the genes that they carried out of Africa. [/qb][/QUOTE]Agreed By the logic they apply all Africans should have that admixture. So what is it? How does it translate into alleles? [/QB][/QUOTE]
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