Punnett Square Calculator

Generate Punnett squares to visualize and predict the outcomes of genetic crosses.

Parent 1 Alleles

Parent 2 Alleles

Punnett Square

Aa
AAAAa
aAaaa

Genotype Frequencies:

AA1/4 (25%)
Aa2/4 (50%)
aa1/4 (25%)

Phenotype Frequencies:

Dominant3/4 (75%)
Recessive1/4 (25%)

About Punnett Squares

A Punnett square is a diagram used to predict the genotypes of offspring from a genetic cross. It shows all possible combinations of alleles from both parents. Use uppercase letters for dominant alleles and lowercase for recessive alleles.