Figure 6.

Mean expected heterozygosity across loci. (A) Decrease in heterozygosity in 239 non-admixed non-Jewish populations in the MS5795 human data set, as a function of distance from Addis Ababa, Ethiopia (9°N, 38°E). The coefficient of determination is R² = 0.841. Symbols follow Figure 2. (B) Heterozygosity in 244 non-admixed non-Jewish populations in the MS5879 human–chimpanzee data set. Populations are ordered by decreasing expected heterozygosity and are colored by geographic affiliation as in Figure 2; chimpanzee bars appear in black. Key: B, bonobo; C, central common chimpanzees; E, eastern common chimpanzees; U, unreported common chimpanzees; W, western common chimpanzees. In both plots, populations with fewer than five individuals are excluded (Barega, Dogon, Eton, Ewondo, Fulani [Nigeria], and hybrid chimpanzees). Expected heterozygosities are provided for human populations in Table S20 and for chimpanzee populations in Table S23.