Figure 3:

Special case of the variance of ancestry under a single-admixture scenario with negative assortative mating in the founding generation. (A) Autosomes $\mathbb{V}\left[H_{1,g,\delta }^A\right]$. (B) X chromosomes in a female, $\mathbb{V}\left[H_{1,g,f}^X\right]$. (C) X chromosomes in a male, $\mathbb{V}\left[H_{1,g,m}^X\right]$. In each panel, the variance is plotted for negative assortative mating, c_11,0 = −0.25, using eqs. (41), (43), and (44) with $s_{1,0}^f=s_{1,0}^m=0.5$. The plot highlights a special case in which the variance of autosomal admixture is zero because the numerator of eq. (41) is zero, even though $s_{1,0}^f=s_{1,0}^m=0.5$ is a maximum of the variance with respect to the sex-specific contributions in a randomly mating population. The c_11,0 = 0 case is copied from Figure 2.