How to Use the Allele Frequency Calculator
Calculate allele frequencies from observed diploid population counts:
Enter AA Count
Input total number of homozygous dominant individuals.
Enter Aa Count
Input total number of heterozygous individuals.
Enter aa Count
Input total number of homozygous recessive individuals.
View p and q
Inspect dominant (p) and recessive (q) allele frequencies.
Key Features & Population Genetics
Gene Counting Method
Calculates exact allele proportions without requiring equilibrium assumptions.
Gene Pool Verification
Verifies p + q = 1 constraint across entire population sample.
100% Private Client Compute
Runs in browser memory with zero tracking or server logs.
Genetics Guide: Measuring Allele Frequencies in Populations
In population genetics, allele frequency measures the relative proportion of a specific gene variant (allele) at a locus in a population. Calculating allele frequencies is the foundation for analyzing natural selection, genetic drift, and gene flow.
Frequently Asked Questions
?What is the difference between genotype frequency and allele frequency?
Genotype frequency measures the proportion of individuals with a specific pair of alleles (e.g. AA, Aa, aa), whereas allele frequency measures the proportion of single gene copies (A vs. a) in the gene pool.