Punnett Square Calculator
Free interactive genetic cross calculator for monohybrid, dihybrid, and custom trait analysis. Get instant, accurate results with our easy-to-use calculator.
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