Course Content
Learn Introductory plant breeding with Braimy- B.Sc agriculture
About Lesson
  • The Hardy-Weinberg law states that the gene and genotype frequencies in a Mendelian population remain constant generation after generation if there is no selection, mutation, migration or random drift.
  • The frequencies of the three genotypes for a locus with two alleles, say A and a, would be p2 A, 2pq Aa, and q2 aa ; where p represents the frequency of A and q represents the frequency of a allele in the population, and the sum of p and q is one, i.e., p+q=1.
  • Such a population would be at equilibrium since the genotypic frequencies would be stable, that is, would not change, from one generation to the next.
  • This equilibrium is known as Hardy-Weinberg equilibrium.
  • A population is said to be at equilibrium when frequencies of the three genotypes, AA, Aa and aa are p2, 2pq and q2, respectively.
  • Whether a population is at equilibrium or not can be easily determined using a chi-square test.
  • Hardy-Weinberg law can be easily explained with the help of an example.

Join the conversation
Scroll to Top