The consequences of the intensity of natural selection on allele frequency.

(a) The curves illustrate the relationship between the rate of change in f (B1) and the intensity of natural selection.(b) Relative fitness values for natural selection of different intensities(a) The curves illustrate the relationship between the rate of change in f (B1) and the intensity of natural selection.(b) Relative fitness values for natural selection of different intensities

A m V & O .0 a> .0 03 Frequency of allele B, O b 0.2 0.0 0 200 400 600 800 Generation (b) Selection strength Relative fitness Strong 3137 B1B2 3sz — 1.0 0.90 0.80 — 1.0 0.98 0.96 — 1 0 0.99 0.98 — 1 0 0.995 0.990 — 1 0 0.998 0.996 Weak 1000