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[QUOTE]Originally posted by huy60: [QB] Oh, and before i forget : The history and geography of human genes http://books.google.fr/books?id=FrwNcwKaUKoC&printsec=frontcover&redir_esc=y#v=onepage&q&f=false "In summary, the information available on individual groups in Ethiopia and North Africa is fairly limited but sufficient to show that they are all separate from sub-Saharan Africans and that North Africans and East Africans (Ethiopian and neighbors) are also clearly separate. Estimation of admixture by standard methods (Guglielmino-Matessi et al., in prep.) has given values of about 60% African and 40% Caucasoid, using sub-Saharan Africans as African “parents” and Southwest Asians as Caucasoid parents. Because very similar results are obtained using North Africans as Caucasoid parents, it is difficult to tell whether Southwest Asians or North Africans contributed the Caucasoid genes. Perhaps both did. Using the simple Fst approach discussed in chapter 1 for calculating admixtures, average gene frequencies from Nilotic speakers as prototypes of African ancestors, as well as gene frequencies of North Africans averaged for the five groups of table 3.6.1 as Caucasoid ancestors, one obtains 53% of African (and 47% Caucasoid) contribution for Tigre, 57% for Amhara, 56% for Cushitic." Population genetic structure of variable drug response http://ucl.ac.uk/tcga/tcgapdf/Wilson-NatGen-01-GDR.pdf "Notably, 62% of the Ethiopians fall in the first cluster, which encompasses the majority of the Jews, Norwegians and Armenians, indicating that placement of these individuals in a ‘Black’ cluster would be an inaccurate reflection of the genetic structure. Only 24% of the Ethiopians are placed in the cluster with the Bantu and most of the Afro-Caribbeans; however, 21% of the Afro-Caribbeans are placed in a cluster with the West Eurasians (presumably reflecting genetic exchange with Europeans)." [/QB][/QUOTE]
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