Q10

A farmer intends to artificially inseminate cows with semen from a bull which has been chosen based on characteristics of colour and muscle mass. The farmer does not know that the bull is heterozygous for a rare recessive allele not previously present in the farmer’s cow population. The introduction of this recessive allele to the population of cows is an example of
A. gene flow.
B. genetic drift.
C. natural selection.
D. selective breeding.