Question

Hardy-Weinberg Law states that the gene and genotype frequencies in a Mendelian population remain constant generation after generation if there is no __________, mutation, migration or random drift.

• A. selection
• B. succession
• C. variation
• D. deletion

Hint:

Recall the five standard assumptions of Hardy-Weinberg equilibrium.

Answer 1

The Correct Option is A

Step 1: The Hardy-Weinberg principle describes a population that is in genetic equilibrium, meaning allele and genotype frequencies do not change over generations.

Step 2: This equilibrium only holds under a set of assumptions, no mutation, no migration (gene flow), no genetic drift, random mating, and no natural selection acting on the population.

Step 3: The question already lists mutation, migration and random drift, so the missing condition from the standard list is selection.

Step 4: Succession, variation and deletion are not standard Hardy-Weinberg assumptions, so selection is correct.