The expected waiting time for the emergence of (A) genomes with different numbers of resistance mutations for different n when E = 0, (B) the corresponding n
th mutants as a function of E, (C) quintuple mutants when n = 5 as a function of the crossover frequency (ρl), for E = 0.005 (green), 0 (red), −0.005 (blue). The inset in (C) shows the corresponding reduction in the time of emergence, 1−W(ρl)/W(ρl = 0). (D) Model predictions of emergence (filled symbols) and fixation (open symbols) times of double mutants when n = 2 and E = 0.05 (green), 0 (red), −0.05 (blue). In (A) to (C), we let ε0 = 0.85 and εn = 0.25, whereas in (D) ε0 = 0.1 and εn = 0. All the other parameters are identical to those in Figure 4.