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Hardy-Weinberg law



A principle stating that both allele and genotype frequencies in a randomly-mating population remain constant – and remain in this equilibrium across generations -- unless a disturbing influence is introduced.


For instance, a population containing the genotypes AA, aa and Aa, the frequency of AA will always be p2, aa will be q2, and Aa will be 2pq at equilibrium, where the p is the frequency of A and q is the frequency of a.

Deviation from Hardy-Weinberg principle indicates evolution of species. Examples of disturbing influences include non-random mating, mutations, selection, limited population size, random genetic drift and gene flow.

Word origin: named after G. H. Hardy and Wilhelm Weinberg.


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Question on Hardy Weinburg Law

Hi, I'm stuck on this frequency calculation probelm. It would be great if someone knows how to solve it and helps me out. Given: There are 3 genotypes making up a small population of 50 individuals, with respect to one gene with two alleles. The alleles for the gene are A^P, Pink allele and A^Y, yel...

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by DerHaus
Fri Feb 15, 2008 5:18 pm
Forum: Genetics
Topic: Question on Hardy Weinburg Law
Replies: 2
Views: 2001

Equation for Hardy – Wineburg Law

Use this equation and see if helps. Binomial E :D xpansion: p2+ 2pq+p2=1

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by Martinezgirl
Mon Jun 06, 2005 10:08 pm
Forum: Genetics
Topic: Hardy weinburg equation please HELP!!!!!!!!!!!!!!!!!!!!!!!!!
Replies: 19
Views: 14685

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