A mutant red coat color allele (Yr) arises in island B and is present in the adult population in a heterozygous individual in the population of 117 adults of year 2000. Yr is recessive to the other alleles at the Y locus. What is the probability (p) that, purely by the action of genetic drift, the allele will rise to fixation (reaching a frequency of 1. 0) at some time in the future?
(A) 0. 0 < p < 0. 2 (B) 0. 2 < p < 0. 4 (C) 0. 4 < p < 0. 6
(D) 0. 6 < p < 0. 8 (E) 0. 8 < p < 1. 0
For the same genetic scenario, what if the single red allele arose in the island A and was present by 1990 in a heterozygous individual, one of a population 12 individuals. Would this red mutant allele have a better or worse chance of rising to fixation relative to the island B population of problem 5?
(A) red allele more likely to reach fixation in A island beginning in 1990 compared to B island beginning in 2000.
(B) red allele less likely to reach fixation in A island beginning in 1990 compared to B island beginning in 2000
