Punnett Square Calculator
Enter parent genotypes and the tool draws the Punnett square, lists offspring genotypes, and computes phenotype ratios.
Parent genotypes
×
Use uppercase for the dominant allele and lowercase for the recessive (e.g.
Aa, AABb). Up to 2 genes are supported (monohybrid or dihybrid).
Inheritance mode:
Aa × Aa
AaBb × AaBb
Rr × rr (test cross)
RR × rr
AaBb × aabb