Hardy–Weinberg: Alleles Calculator
🧬 Genetics & evolution. Use the Hardy–Weinberg: alleles formula to find p (dominant allele), q (recessive allele): pick the value you want, type the others, and the answer updates as you go.
p = frequency of the dominant allele, q = frequency of the recessive allele.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| p (dominant allele) | no unit |
| q (recessive allele) | no unit |
Worked example
Find the p (dominant allele) when q (recessive allele) = 0.7.
Using p + q = 1: p (dominant allele) = 0.3.
Frequently asked questions
What is the formula for Hardy–Weinberg: alleles?
p + q = 1. p = frequency of the dominant allele, q = frequency of the recessive allele.
What do the letters stand for, and what units are used?
p (dominant allele), q (recessive allele).
How do you calculate p (dominant allele)?
Put the values into p + q = 1. For example, with q (recessive allele) = 0.7, p (dominant allele) = 0.3.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (p (dominant allele), q (recessive allele)) and fill in the others: it rearranges the formula for you.
