Question

what is a mode of natural selection that favors a phenotype at one end of a range of variation?

stabilizing selection
disruptive selection
directional selection

Explanation:

Analyze the question prompt

The question asks for a mode of natural selection favoring a phenotype at one extreme end of a range of variation.

Define the selection modes

We evaluate how different modes of selection affect Phenotypic Variation in a population:

• Stabilizing selection favors intermediate phenotypes, reducing variation.
• Disruptive selection favors both extreme phenotypes, splitting the population.
• Directional selection shifts the population's traits toward one extreme.

Identify the correct mode

Since selection favors a phenotype at one end of the range, it is directional selection.

Answer:

• Stabilizing selection
• Disruptive selection
• Directional selection (Correct answer)