Punnett Square Probability Calculator

Estimate genotype and phenotype probabilities for a simple single-gene inheritance cross.

Parent 1 genotype (AA, Aa, or aa)

Parent 2 genotype (AA, Aa, or aa)

—

AA genotype—

Aa genotype—

aa genotype—

Dominant phenotype—

Recessive phenotype—

How this calculator works

Estimate genotype and phenotype probabilities for a simple single-gene inheritance cross.

Use consistent units and carefully reviewed inputs. Results are estimates for education, laboratory planning, and general informational use.