Which of the following selection type causes a continuous phenotypic to change in its mean value?
Directional Selection
Disruptive selection
Stabilizing selection
Natural selection
Option (a)
The distribution curve shifts in one direction by directional selection and changing the character's average value. This directional selection favors phenotypes with extremes of a normal distribution. Hence, directional selection will cause a continuous phenotypic to change in its mean value.
Option 1 is the correct answer.