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"The African diversity estimate is even higher than that between Africans and Eurasians (0.096% ± 0.012%). From available data for noncoding autosomal regions (total length = 47,038 bp) and X-linked regions (47,421 bp), we estimated the -values for autosomal regions to be 0.105, 0.070, 0.069, and 0.097% for Africans, Asians, Europeans, and between Africans and Eurasians, and the corresponding values for X-linked regions to be 0.088, 0.042, 0.053, and 0.082%. Thus, Africans differ from one another slightly more than from Eurasians, and the genetic diversity in Eurasians is largely a subset of that in Africans, supporting the out of Africa model of human evolution. Clearly, one must specify the geographic origins of the individuals sampled when studying or SNP density......Interestingly, both autosomal and X-linked sequence data show higher DNA variation within Africans than between Africans and Eurasians (Table 2), contrary to the general observation of lower within-population than between-population differences in population genetics. This finding implies that Africans differ on average more among themselves than from Eurasians............For these reasons, the genetic differences between non-Africans and Africans are on average smaller than the genetic differences within Africans."
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