What does the Hardy-Weinberg principle describe?

• A. Population growth
• B. Genetic equilibrium in a population
• C. Evolutionary changes
• D. Dominance in traits

Answer: (B)

The Hardy-Weinberg principle describes the concept of genetic equilibrium within a population, outlining the conditions under which allele and genotype frequencies remain constant from generation to generation in the absence of evolutionary forces. It establishes a mathematical model that predicts how genetic variation will be maintained in a population that is not influenced by factors such as natural selection, mutation, migration, or genetic drift.

According to this principle, if a population is in Hardy-Weinberg equilibrium, the frequencies of alleles and genotypes can be calculated, and expected frequencies can be compared to observed frequencies to detect changes or deviations. This principle serves as a foundation for understanding population genetics and is crucial in studying the impact of evolutionary mechanisms on genetic diversity and population structure.

The other options related to population growth, evolutionary changes, and dominance in traits do not directly relate to the core of what the Hardy-Weinberg principle addresses, which is the stability of allele frequencies in a non-evolving population.