Biology

Punnett Square Calculator

Lets users compute and verify punnett square instantly with formula, steps and examples — no manual math.

Enter your details

Your result
Genotype ratio (AA:Aa:aa)
1:2:1

Genotype ratio 1 AA : 2 Aa : 1 aa → 75% show the dominant trait.

Phenotype
75% dominant

About this calculator

A monohybrid Punnett square crosses two single-gene genotypes and predicts offspring ratios. Aa × Aa gives the classic 1:2:1 genotype and 3:1 phenotype ratio.

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