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Genomic Ancestry of North Africans Supports Back-to-Africa Migrations Brenna M. Henn
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[QUOTE]Originally posted by Swenet: [QB] [QUOTE]Originally posted by Amun-Ra The Ultimate: [qb] [QUOTE]Originally posted by Swenet: [qb] How do they contradict each other? Which specific authors of the papers under discussion engage in sampling bias? Of what issues, exactly, can it be said that the truths geneticists' sought to uncover, haven't been uncovered? [/qb][/QUOTE]I already posted an example of sample bias and study contradictions in this thread (actually it was alTakruri who did). http://www.egyptsearch.com/forums/ultimatebb.cgi?ubb=get_topic;f=8;t=008327;p=4#000179 http://www.egyptsearch.com/forums/ultimatebb.cgi?ubb=get_topic;f=8;t=008327;p=2#000078 [/qb][/QUOTE]You did NOT post an example of sample bias that justify your endless barrage of unfounded complaints at the address of Henn et al 2012. It was not the purpose of this paper to comprehensively map the entire North African genetic landscape, and none of the conclusions that they intended to draw required all samples to be representative, for the conclusions to be sound. In short, you have not pointed out how the characteristics of Maghrebi component (the general theme of the paper) was affected by non-random sampling of Tunisians, or the other perceived issues you had with Henn et al 2012. Additionally, Henn et al 2012 made no pretenses to frame any of their North African samples as representative for North Africa, indeed, they even stated that the study's observations regarding the Maghrebi component are not necessarily generalizable to other North Africans South of the sampled populations: [i]Although we observe a declining amount of Maghrebi ancestry from northwest-to-northeast, [b]it is possible that other geographically North African samples (e.g. Egyptians further south than the sampled Siwa Oasis) do not conform to this geographic cline.[/b][/i] --Henn et al 2012 [/QB][/QUOTE]
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