Biology

Allele Hardy Weinberg Frequency

Estimate allele frequencies from a recessive homozygous frequency under Hardy-Weinberg equilibrium.

q = √(q²); p = 1 - q

Formula Explanation

When assumptions of Hardy-Weinberg equilibrium hold, the recessive homozygous genotype frequency is q².

Variables Explained

q = Recessive allele frequency; p = Alternative allele frequency.

Solved Example

If q² = 0.09, find q and p.
q = √0.09 = 0.3; p = 1 - 0.3 = 0.7.

Exam Tip

This inference assumes Hardy-Weinberg equilibrium and the correct identification of q².