purifying selection


purifying selection
/pjurəfaɪɪŋ səˈlɛkʃən/ (say pyoohruhfuying suh'lekshuhn)

noun
a mode of natural selection in which there is a tendency towards the elimination of extreme traits resulting in less genetic diversity. Compare balancing selection, directional selection.
Also, stabilising selection.

Australian English dictionary. 2014.