Correspondence between Moran and diffusion predictions and accuracy of predictions as assessed by simulations (averaged over 10,000 iterations). Dotted line, Watterson diffusion; dashed line, Kimura–Crow diffusion; thick dots, Moran solution; solid line, simulations. Symmetric overdominant selection is shown. Moran model parameters: (A) N = 2000, s = 0.001, u = 10−5; (B) N = 2000, s = 0.005, u = 10−5; (C) N = 2000, s = 0.01, u = 10−5.