Figure 4From: Sexual selection and the evolution of obligatory sexConditions for fixation of an allele for obligatory sex under environmental changes. The contours represent the critical mutation rate above which obligatory sex fixes. Contour lines with t = 0,0.2 and 0.4 are shown. The white area above the t = 0 contour is the parameter range in which obligatory sex fixes even in a constant environment. The plot was generated using C sex = 0.5, a = 0.99, s = 0.05, and N = 50, with free recombination. Environmental changes occurred every 10 generations (A) or every 25 generations (B). Fixation of the allele O was defined as reaching a frequency higher than 99.9% within 2500 generations and retaining it for four consecutive cycles of environmental change.Back to article page