# Hardy Weinberg EQs
### Hardy-Weinberg Equations Overview
- Two key equations for population genetics
- p + q = 1 (allele frequencies)
- p² + 2pq + q² = 1 (genotype frequencies)
- p = dominant allele frequency, q = recessive allele frequency
- p² = homozygous dominant, 2pq = heterozygous, q² = homozygous recessive
- Only works for genes with two alleles
- Blood groups exception: can use if only 2 of 3 alleles present in population
### Problem-Solving Method
- Dominant