Meaning of Hardy-Weinberg law

Har'dy-Wein'berg law"

Pronunciation: (här'dē-wīn'bûrg), [key]
— Genetics. Genetics.
  1. a principle stating that in an infinitely large, randomly mating population in which selection, migration, and mutation do not occur, the frequencies of alleles and genotypes do not change from generation to generation.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.