Figure 5 .

Allele frequency trajectories for synthetic sterility. Selection coefficients for male sterility are $s_{\text{I,male}}=1$ and $s_{\text{I,fem}}=0$. Selection coefficients for female sterility are $s_{\text{I,male}}=0$ and $s_{\text{I,fem}}=1$. Single-locus fitness effects are assumed to be absent. Mutation rates equal ${10}^{-5}$. (A) Synthetic male sterility with complete recessivity; (B) synthetic male sterility with complete dominance; (C) synthetic female sterility with complete recessivity; (D) synthetic female sterility with complete dominance. Curves were generated by iterating the equations for allele frequency change. Directions of allele frequency change are denoted with solid arrowheads, and a shaded circle denotes an unstable internal equilibrium in D. Axes use an arcsine square-root scale.