Punnett Square Calculator
Interactive genetic cross calculator for monohybrid, dihybrid, and custom trait analysis.
Cross Parameters
Use uppercase for dominant alleles, lowercase for recessive alleles
Punnett Square
Enter cross parameters to generate Punnett square
Punnett Square Guide
Monohybrid Cross
- • Single trait inheritance
- • 2x2 Punnett square
- • Shows 3:1 phenotypic ratio
- • Example: Flower color
- • 1:2:1 genotypic ratio
Dihybrid Cross
- • Two trait inheritance
- • 4x4 Punnett square
- • Shows 9:3:3:1 ratio
- • Independent assortment
- • Multiple phenotypes
Genetic Terms
- • Allele: Gene variant
- • Genotype: Genetic makeup
- • Phenotype: Physical trait
- • Dominant: Expressed allele
- • Recessive: Hidden allele