Figure 7:

Normalized mean coalescence times on the X chromosome under matrilateral-cross 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-cross pairs (c₁): (A) $\mathbb{E}\left[T_f\right]/(3N)$, Eq. 42. (B) $\mathbb{E}\left[V_{mf}\right]/(3N)$, Eq. 45. The dashed lines represent the maximal reduction due to consanguinity, obtained by setting $c_1=1:\frac{4}{7}$ in (A) and $\frac{5}{7}$ in (B).