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2. (8 pts) The top panel below shows the tracking over 20 generations of frequency of a particular allele in 20 populations o

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(a) In the first panel, 15 populations and in the second panel, all the 20 populations reached fixation. Fixation is the change in the gene pool from a situation where exits at least two variants of a particular allele in a given population to a situation where only one of the alleles remains. In the first panel, 5 of them got lost and eventually, only 15 reached the end.

(b) It illustrates genetic drift because Genetic drift can lead to large changes in populations over a short period of time. Genetic drift leads to fixation of alleles in populations as it increases the inbreeding coefficient and increases homozygosity as a result of removing alleles.

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