Which of the graphs shown best represents the relationship between the intensity of directional selection and the genetic variation present within a population?
A) Graph A
B) Graph B
C) Graph C
D) Graph D
E) Graph E

Question

Which of the graphs shown best represents the relationship between the intensity of directional selection and the genetic variation present within a population?
A) Graph A 
B) Graph B 
C) Graph C 
D) Graph D 
E) Graph E

Quizplus · Accepted Answer

Graph B shows a negative correlation between the intensity of directional selection and genetic variation. As the intensity of selection increases, the genetic variation decreases. This is because directional selection favors individuals with certain traits, causing those traits to become more common and reducing genetic diversity within the population. None of the other graphs show a clear relationship between intensity of selection and genetic variation.

Which of the Graphs Shown Best Represents the Relationship Between