Fig. 4.

Admixture graph schematics representing alternative historical scenarios to explain shared drift between MA1 and East Asians. (A) MA1 is admixed, with East Asian-related ancestry. (B) Ami is admixed, with MA1-related ancestry. Other relationships are assumed as shown (the position of the root is arbitrary). The expected values of the statistics (1) f₄(MA1, K14; Ami, Ust’-Ishim) and (2) f₄(Ust’-Ishim, MA1; Onge, Ami) are equal to a branch length times a mixture proportion: red for (1) and black for (2) [times α₁ in (A) and α₂ in (B)].