Question

Genetic drift is an account of ………………………

• A. variations
• B. increase in population
• C. mutations
• D. abrupt decrease in population

Answer 1

The correct option is D

abrupt decrease in population

Genetic drift is one of the basic mechanisms of evolution. Genetic drift affects the genetic makeup of the population but, unlike natural selection, through an entirely random process. So although genetic drift is a mechanism of evolution, it doesn't work to produce adaptations. It leads to decrease in population by a sudden accident such as stamping insect population by man’s foot etc.