Question

Drastic reduction in the population of an animal during winter or other unfavourable periods is known as

• A. Gene stress
• B. Hybrid breakdown
• C. Genetic bottleneck
• D. Gene flow

Answer 1

The correct option is C Genetic bottleneck

• A population bottleneck is a sharp reduction in the size of a population due to environmental events (such as earthquakes, floods, fires, or droughts) or human activities (such as genocide).
• Such events can reduce the variation in the gene pool of a population.

So the correct answer is option C.