Figure 6:

Normalized mean coalescence times on the X chromosome under matrilateral-parallel first-cousin mating. Coalescence times are plotted as a function of the number of mating pairs (N) and the proportion of mating pairs that are matrilateral-parallel pairs (c₁). (A) $\mathbb{E}\left[T_f\right]/(3N)$, Eq. 34. (B) $\mathbb{E}\left[V_{mf}\right]/(3N)$, Eq. 37. The dashed lines represent the maximal reduction due to consanguinity, obtained by setting c₁ = 1: $\frac{8}{17}$ in (A) and $\frac{11}{17}$ in (B).