Question

If the frequency of one allele in a population is 0. 7 in a population with two alleles at a particular locus, what is the frequency of the alternate allele?

Answer 1

According to Hardy- Weinberg principle, if the frequency of one allele in a population with two alleles is 0.7 at a particular locus, then the frequency of alternate allele is 0.3.

What is Hardy- Weinberg equilibrium?

• Hardy- Weinberg rule states that in the absence of disturbing factors, the genetic variability in a population remains constant in different generations.
• It states that when mating is random both the genotypic and allelic frequencies remain constant as they are in equilibrium.
• Hardy- Weinberg rule applies to a large population where mating is random and there is no migration.
• It is given by p + q = 1, where p is the frequency of dominant allele in the population, q is the frequency of recessive allele in the population.
• By squaring, p2+ 2pq+ q2= 1, where p2 is percentage of homozygous dominant individuals, q2 is percentage of homozygous recessive individuals. 2pq is percentage of heterozygous individuals.
• Here given, p= 0.7, therefore q= 1- 0.7= 0.3

Learn more about Hardy- Weinberg equilibrium here:

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