In a very large population, a quantitative trait has the following distribution pattern:

-What is true of the trait whose frequency distribution in a large population appears in the previous figure? It has probably undergone
A) directional selection.
B) stabilizing selection.
C) disruptive selection.
D) normal selection.

Question

In a very large population, a quantitative trait has the following distribution pattern:
 
-What is true of the trait whose frequency distribution in a large population appears in the previous figure? It has probably undergone
A) directional selection. 
B) stabilizing selection. 
C) disruptive selection. 
D) normal selection.

Quizplus · Accepted Answer

The frequency distribution has a symmetric bell shape, which is characteristic of stabilizing selection. This means that individuals with intermediate values of the trait have a higher fitness than those with extreme values, causing the distribution to become more concentrated around the mean over time. The other options are unlikely because they would result in different shapes of frequency distribution.

In a Very Large Population, a Quantitative Trait Has the Following