Figure 5.

Heat map for the fixation probability of the mutant type, A, as a function of (half) the width of the mutant fitness distribution, Δ_a, and that of the resident fitness distribution, Δ_b. The fitness values for the mutant and resident are uniformly distributed on $[\overline{a}-{\mathrm{\Delta }}_a,\overline{a}+{\mathrm{\Delta }}_a]$ and $[\overline{b}-{\mathrm{\Delta }}_b,\overline{b}+{\mathrm{\Delta }}_b]$, respectively, where $\overline{a}=\overline{b}=1$. The population size is N = 10, and the results are obtained from numerical solutions to the Kolmogorov equation.