Question

When a change in the gene frequency of population occurs by chance, it is called

• A. Genetic recombination
• B. Genetic drift
• C. Founder effect
• D. Gene migration

Hint:

Genetic drift is the random fluctuation of allele frequencies in a small population due to chance events, while gene migration refers to the movement of genes between populations.

Answer 1

The Correct Option is B

• Genetic Recombination: Refers to the exchange of genetic material during sexual reproduction, but not by chance. This is incorrect.
• Genetic Drift: Refers to random changes in allele frequencies in a population, often due to chance events, such as the bottleneck effect or founder effect. This is correct.
• Founder Effect: A type of genetic drift that occurs when a small population colonizes a new area. This is incorrect in this context.
• Gene Migration: Refers to the movement of genes between populations, not random chance. This is incorrect.

Conclusion: The correct term is Genetic Drift, where gene frequency changes occur by chance.