Q. Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as
A) Genetic flow
B) Genetic drift
C) Random mating
D) Genetic load
Explanation
[Solution from source] A change in allele frequency that happens by chance, not by selection, is genetic drift, and it is strongest in small populations. Gene flow is change due to migration, not chance. Answer (2).
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Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.