Question

The most common kind of selection, which results in the average form of a trait, is

a) Stabilizing selection
b) Directional selection
c) Disruptive selection
d) Artificial selection

Answer 1

Stabilizing selection is the most common type of selection that results in the average form of a trait.

Step-by-step explanation:

The most common kind of selection that results in the average form of a trait is stabilizing selection.

Stabilizing selection occurs when phenotypes at both extremes of the phenotypic distribution are selected against, narrowing the range of variation. An example is human birth weight, where babies that are very large or very small at birth are less likely to survive, keeping birth weight within a relatively narrow range.

Therefore, the correct answer is a) Stabilizing selection.