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in eastern grey squirrels, the allele for black fur (B) is dominant to the allele for grey fur (b). in a particular population of grey squirrels, 64% have black fur and 36% have grey fur. a researcher calculated the allelic frequencies to be B = 0.4 and b = 0.6. five years later, the researcher returned to the location and determined the allelic frequencies within the squirrel population to be B = 0.6 and b = 0.4. which of the following could best explain the increase in the frequency of the allele in the population after five years?a) the frequency of the B allele increased because it is the dominant alleleb) the frequency of the B allele increased because squirrels with grey fur exhibited greater fitnessc) the frequency of the B allele increased due to the selective pressures of the environmentd) the frequency of the b allele increased because black squirrels randomly mate with other eastern grey squirrels

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