Question

Genetic drift occurs due to __________.

• A. Natural selection
• B. Sudden elimination of particular allele
• C. Continuous gene movement
• D. Mutation

Hint:

Genetic drift is a random change in allele frequency, often by chance elimination of alleles.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept
Genetic drift is the random change in allele frequency in a small population.

Step 2: Cause
It occurs due to chance events that suddenly eliminate particular alleles from the population, such as the founder effect and the bottleneck effect.

Step 3: Compare the options
Natural selection, continuous gene movement (gene flow) and mutation are separate evolutionary forces. The sudden elimination of an allele describes drift.

Final Answer:
Genetic drift occurs due to sudden elimination of a particular allele. \[ \boxed{\text{(B) }\text{Sudden elimination of particular allele}} \]