Biology & Genetics
Population Genetics: The Hardy-Weinberg Equilibrium Explained
9 min read • Published by Academic Research Team
1. Executive Summary & Core Concept
The Hardy-Weinberg principle states that allele and genotype frequencies in a population remain constant from generation to generation in the absence of evolutionary influences such as mutation, natural selection, genetic drift, gene flow, and non-random mating.
2. The Hardy-Weinberg Equations
For a locus with two alleles, p represents the frequency of allele A and q represents the frequency of allele a:
Allele Frequency Equation: p + q = 1
Genotype Frequency Equation: p2 + 2pq + q2 = 1
3. Applications in Genetic Counseling and Research
Geneticists use these formulas to estimate carrier frequencies for autosomal recessive medical conditions and detect evolutionary pressures acting on biological populations.