Question

Genetic drift operates in

• A. Non-reproduction population
• B. Slow reproduction population
• C. Small isolated population
• D. Large isolated population

Answer 1

Answer: (C)

Small isolated population

Genetic drift is a change in gene frequency in successive generation of a small population due to chance alone rather than natural selection or gene transfer. The effect of genetic drift on a small population is large as compared to that in the larger population which, owing to its large size and a large number of gametes produced, has a greater probability to accurately represent the allelic frequency of a parental population. An isolated population rules out the possibility of gene flow.

Therefore, the correct answer is option C.