Figure P15.3. Distribution of allele frequencies at 1, 5, 40 generations (red, green, blue). The populations eventually fix for one or other allele (bars at left or right). Fixation is negligibly rare at t = 1, but by t = 5, there is a chance 0.013 that the p allele is lost, and by t = 40, there is a 46.3% chance that it is lost and 9.8% that it is fixed.

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