Question

Which of the following statements correctly defines the phenomenon of genetic drift?
I. It is random change in gene allele frequency.
II. It occurs by chance.
III. It is directional.
IV. It causes elimination of certain alleles.
V. It causes fixation of alleles.
The correct combination is

• A. I, II and III
• B. III, IV and V
• C. I, III and V
• D. I, II, IV and V

Answer 1

Answer: (D)

Statements I, II, IV and V are correct and statement III is incorrect. It can be corrected as
Genetic drift is the random change in the allele frequency caused by sampling error across generation in a definite population. The consequences of genetic drift are not predicted that is why it is called non-directional.