Consider statements about evolution: 1. Genetic drift is a random change in allele frequencies. 2. Gene flow occurs through migration. 3. Natural selection is a random process. Which are correct? MCQ with Answer and Explanation
Consider statements about evolution: 1. Genetic drift is a random change in allele frequencies. 2. Gene flow occurs through migration. 3. Natural selection is a random process. Which are correct?
A. 1 and 3 only
B. 2 and 3 only
C. 1, 2 and 3
D. 1 and 2 only
Answer: Option D
Solution (By JKExamLibrary)
Genetic drift is the random fluctuation of allele frequencies in a population, particularly significant in small populations, due to chance events. Gene flow (migration) is the transfer of alleles from one population to another through the movement of individuals or gametes. Natural selection is a non-random, deterministic process where individuals with traits better suited to their environment have higher survival and reproductive success. Thus, statements 1 and 2 are correct.
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