What do directional selection and disruptive selection have in common?

Answer:
Aside from decreasing genetic variation they both are not normal Gaussian curves. Disruptive selection has two normal curves at either end of the distribution. Directed selection has an abnormal curve with most of the data distributed is a skewed manner from the mean of distribution.
First answer by Neodarwinian. Last edit by Neodarwinian. Contributor trust: 126 [recommend contributor recommended]. Question popularity: 1 [recommend question].