Question

Few statements related to genetic drift are given below. Find out the incorrect statement among the four.

• A. There is a random change in the allele frequency in a given population.
• B. It is significant only in large population.
• C. It is a mechanism for evolution of new species.
• D. It may or may not help a species to adapt.

Answer 1

The correct option is B It is significant only in large population.

Genetic drift or allelic drift is the change in the frequency of a gene variant in a population due to random sampling. It is more likely to happen in small populations. It results in the change of frequency of an allele in the isolated population. This is the mechanism which is used for the evolution of the new species or it may, however, not always, provide the ability to a species to adapt.

Thus, the correct answer is option B.