stabilising selection

Question 1

Stabilising selection is

Answer 1

natural selection that keeps allele frequencies relatively constant over generations

This means things stay as they are unless there is a change in the environment

Question 2

example classic example of stabilising selection can be seen in human birth weights

Very-low and very-high birth weights are selected against leading to the maintenance of the intermediate birth weights

Question 3

Stabilising selection selects which phenotypes

Answer 3

Stabilising selection selects against the extreme phenotypes (high and low birth weights) and selects for the intermediate phenotypes (medium birth weights)