Question

Genetic drift operates in which of the following population?

• A. Large isolated population
• B. Small isolated population
• C. Fast reproductive population
• D. Slow reproductive population

Answer 1

The correct option is B Small isolated population

• Genetic drift is defined as the variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.
• Genetic drift occurs in small populations because the reason is occasional occurrences of alleles getting lost with higher probability. If and when this loss of alleles starts then the genetic drift continues until that specific allele is totally lost in the entire population.
  
• Hence Genetic drift operates in a small isolated population.
• So, the correct answer is 'Small isolated population'.