Question

Which one of the following factors will not affect the Hardy-Weinberg equilibrium?

• A. Genetic recombination
• B. Genetic drift
• C. Gene migration
• D. Constant gene pool

Answer 1

The Correct Option is D

The Hardy-Weinberg equilibrium is a principle in population genetics that states that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors. Several factors such as genetic drift, gene migration, mutation, non-random mating, and selection can affect this equilibrium. However, let's evaluate the given options to determine which factor does not affect the Hardy-Weinberg equilibrium:

• Genetic recombination: This process involves the exchange of genetic material during meiosis and can introduce new genetic combinations within a gene pool, potentially affecting allele frequencies.
• Genetic drift: It is a mechanism of evolution due to random changes in allele frequencies, especially pronounced in small populations, thereby affecting the equilibrium.
• Gene migration: Also known as gene flow, this involves the movement of alleles between populations, altering allele frequencies and affecting equilibrium.
• Constant gene pool: This represents a stable gene pool without changes in allele frequencies. It indicates a scenario where none of the disturbing factors are at work, thus maintaining the Hardy-Weinberg equilibrium.

Thus, the correct answer is Constant gene pool as it indicates no change in allele frequencies, maintaining the equilibrium.

Answer 2

The Hardy-Weinberg equilibrium assumes no change in allele frequencies in a population, meaning no evolution occurs. The factors that can affect this equilibrium include:

Genetic drift, which causes random changes in allele frequencies, especially in small populations.

Gene migration or gene flow, which introduces new alleles into a population.

Genetic recombination, which creates new allele combinations but does not affect allele frequencies directly.

A constant gene pool is the assumption that the genetic makeup remains stable, and therefore does not affect the equilibrium.

Thus, the correct answer is (4) Constant gene pool.