Biology
Hardy Weinberg Principle
Describe allele and genotype frequencies under ideal population conditions.
p + q = 1; p² + 2pq + q² = 1
Formula Explanation
Under Hardy-Weinberg equilibrium, allele frequencies remain constant across generations when the required assumptions hold.
Variables Explained
p = Frequency of one allele; q = Frequency of the alternative allele; p² and q² = Homozygous genotype frequencies; 2pq = Heterozygous genotype frequency.
Solved Example
If q = 0.2, calculate p and 2pq.
p = 1 - 0.2 = 0.8. Therefore, 2pq = 2 × 0.8 × 0.2 = 0.32.