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Question

Genetic drift

A
refers to the random change in the gene frequency
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B
is same as inbreeding
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C
refers to the change of recessive alleles
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D
Both b and c
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Solution

The correct option is A refers to the random change in the gene frequency
Genetic drift is the random change in the gene frequency by a chance event. Genetic drift may occur in populations of different sizes be it large or small, however, its effects are more prominent in small populations.
A smaller population already has a reduced gene pool. Loss of alleles from a smaller population will more profoundly be noticeable within a less time duration.
This leads to a change in the allele frequencies randomly.
Since genetic drift is a random change in the allele frequency, it can be a change in the dominant or recessive or both alleles. It need not necessarily be a change in only the recessive alleles.

Inbreeding is the mating of individuals which are closely related through common ancestors.

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