Question

question 4 of 10
the phenotype frequency in a population changes after each generation.
which would most likely be causing this?

a. competition between organisms

b. an infinitely large population

c. a lack of mutation

d. random mating

Explanation:

To determine the cause of changing phenotype frequencies, we analyze each option:

• Option A: Competition (e.g., for resources) drives natural selection. Organisms with advantageous phenotypes (better at competing) survive/reproduce more, changing phenotype frequencies over generations.
• Option B: An infinitely large population is a Hardy - Weinberg equilibrium condition, which assumes no change in allele/phenotype frequencies. So this would not cause changes.
• Option C: A lack of mutation means no new genetic variation, and in Hardy - Weinberg terms, it's a condition for no change. So this doesn't cause frequency changes.
• Option D: Random mating is also a Hardy - Weinberg condition, promoting genetic equilibrium, not change.

So competition (Option A) is the most likely cause.

Answer:

A. Competition between organisms