Biology · University
Allele frequency from diploid genotype counts · formula reference
Count copies of the allele, not just individuals carrying it. No equilibrium assumption is needed.
Formula
Count copies of the allele, not just individuals carrying it. No equilibrium assumption is needed.
pA = (2NAA + NAa)/(2Ntotal)
Worked example
A diploid population sample contains 34 AA, 15 Aa, and 32 aa individuals. Find the frequency of allele A. Round the final result to 4 decimal places if needed.
There are 83 A copies among 162 total copies.
0.5123
Prerequisites and checking
Algebra and the topic definitions. Keep units and rounding consistent. State the model conditions before applying the formula.
Further reading and review references
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