Figure 2.

Variation of total fixation probability P with the deleterious mutation rate $U_d$ of the mutator allele. The data shown in circles is obtained by numerically iterating (5) while the dashed and solid lines, respectively, show the analytical expression (9) and the upper bound (D.2). The parameters are $u_d=8\times {10}^{-3},s_b=0.04$ and $s_d={10}^{-3}$ (main), ${10}^{-4}$ (inset).