Predict genetic cross outcomes with a Punnett square. Enter parent genotypes to see offspring genotype ratios, phenotype ratios, and the full Punnett square grid.
Parent 1 Genotype
Parent 2 Genotype
Punnett Square
Results
A Punnett square calculator is a tool used in genetics to predict the genotype and phenotype ratios of offspring from a genetic cross. Named after Reginald Punnett, this grid method shows all possible allele combinations from two parents, making it easy to calculate the probability of inheriting specific traits.
A Punnett square is a diagram used to predict the genotypes and phenotypes of offspring from a genetic cross. It shows the possible allele combinations from each parent in a grid format, making it easy to determine probability ratios for each outcome.
Genotype refers to the genetic makeup (the alleles an organism has, like AA, Aa, or aa). Phenotype refers to the observable trait (like tall or short). An organism with a dominant allele (AA or Aa) will show the dominant phenotype, while only homozygous recessive (aa) shows the recessive phenotype.