Question

Assertion (A): Genetic drift tends to reduce the amount of genetic variation within the population.
Reason (R): In genetic drift alleles with low frequencies are removed in a population.

• (A) and (R) are true. (R) is correct explanation (A).
• (A) and (R) are true. (R) is not correct explanation for (A).
• (A) is true, but (R) is false.
• (A) is false, but (R) is true.

Hint:

Genetic drift reduces diversity by random loss of rare alleles in small populations.

Answer 1

The Correct Option is A

Genetic drift is a random change in allele frequencies in a population.
It often leads to loss of rare alleles, thus reducing genetic variation.

Hence, both assertion and reason are true, and reason correctly explains assertion.

Therefore, the correct choice is:
(A) and (R) are true; (R) explains (A)