In a population with two alleles for a particular genetic...

In a population with two alleles for a particular genetic locus, $B$ and $b$ the allele frequency of $B$ is $0.7 .$ If this population is in Hardy-Weinberg equilibrium, what is the frequency of heterozygotes? What is the frequency of homozygous dominants? What is the frequency of homozygous recessives?

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Key Concepts

Hardy-Weinberg Equilibrium

The Hardy-Weinberg equilibrium principle is a foundational concept in population genetics that describes how allele and genotype frequencies remain constant from generation to generation in an idealized population. It assumes random mating, no mutation, migration, selection, or genetic drift, which provides a baseline expectation against which real population genetic data can be compared.

Allele Frequency

Allele frequency refers to the relative proportion of a specific allele among all alleles for a gene in a population. It is a critical measure for understanding the genetic structure of a population and serves as the basis for predicting genotype frequencies when using the Hardy-Weinberg equilibrium model.

Genotype Frequency Calculations

Genotype frequency calculations involve using the formula derived from the Hardy-Weinberg principle, where for two alleles with frequencies p and q, the expected frequencies of the genotypes are p² for the homozygous dominant, 2pq for the heterozygous, and q² for the homozygous recessive individuals. This method provides quantitative predictions about the genetic makeup of a population.

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