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Stabilising selection is a type of natural selection that favours the average phenotype.
Directional selection is a type of natural selection that favours an extreme phenotype.
Which type of selection is most likely to take place in environments that don't change?
Stabilising
Stabilising selection favours the average phenotype. An average phenotype is more likely to be beneficial in environments that don't change.
Directional selection takes place after an environment has experienced a change.
Which of the following are examples of stabilising selection?
Birth weight ,camouflaged fur, number of eggs ostrich lays
-Before the Industrial Revolution, peppered moths were predominantly white. This allowed them to camouflage with the light-coloured trees and lichens in their habitat.
-The environment changed when the Industrial Revolution darkened the trees with soot.
-The white moths became easier for predators to spot and the white colour was now selected against.
-Natural selection caused the frequency of the black-coloured moth to increase because the black colouration became more favourable.
This selection is called Direction Selection
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