Balanced Alleles
Frequency of Allele A (p): 0.5
Genotype Frequency of AA (p^2): 0.25; Frequency of Allele a (q): 0.5; Genotype Frequency of Aa (2pq): 0.5; Genotype Frequency of aa (q^2): 0.25
Allele Frequency Calculator
Biology0.0(0)
Estimates the frequency of a gene variant in a population using the Hardy-Weinberg equation.
More tools:Science & Lab Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Frequency of Allele A (p) in the units shown.
Step 2
Read Genotype Frequency of AA (p^2), Frequency of Allele a (q), Genotype Frequency of Aa (2pq), and Genotype Frequency of aa (q^2) in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
Dominant Allele Prevalent
Frequency of Allele A (p): 0.7
Genotype Frequency of AA (p^2): 0.49; Frequency of Allele a (q): 0.3; Genotype Frequency of Aa (2pq): 0.42; Genotype Frequency of aa (q^2): 0.09
Recessive Allele Prevalent
Frequency of Allele A (p): 0.3
Genotype Frequency of AA (p^2): 0.09; Frequency of Allele a (q): 0.7; Genotype Frequency of Aa (2pq): 0.42; Genotype Frequency of aa (q^2): 0.49
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