Figure 4.

Average d_N/d_S as a function of the winning probability of a mutant allele. The colored curves show the dependence of ${\overline{\left(d_{\text{N}}/d_{\text{S}}\right)}|}_{\text{CA}}$ on the winning probability ($\frac{1}{2}\left(1+\overline{{\psi }_A}/2\right)$) of the mutant allele A, computed from Equation 17. The diploid population size (N) is set to be 10⁺⁴ (green line) and 10⁺⁵ (cyan line). Red and blue shaded areas represent the ranges of such d_N/d_S values obtained by Torgerson et al. (2002) and by Swanson et al. (2003), respectively.