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.