2. Consider a diploid, self-fertilizing individual in a constant size population of size N . Assume that N = 1 , and that the sole individual is heterozygous A 1 A 2 . (This is the scenario described on page 24 of Gillespie's book.) The figure below shows the genotype frequencies in the first few generations. Figure 2.2: Genotype frequencies for four generations of drift with N = 1 . Prove that the average time for this population (of one individual) to become homozygous is equal to two generations..