A rancher genotypes all of her 150 head of cattle. In her herd, 25 are A1A1, 75 are A1A2, and 50 are A2A2. ? Assuming there is random mating, no selection, no mutation, and no new cattle are introduced into the population, what is the probability that the A1 allele will be fixed? a. 0 b. 0.0127 c. 0.4167 d. 0.6588 e.