Enter the alleles of both parents to calculate the probabilities of different offspring genotypes.
Punnett Square Calculation Formula
The Punnett square is used to predict the genotype combinations of offspring from parental allele pairs. For a dihybrid cross, consider two genes, each with two alleles.
Probability of Offspring Genotype = (Probability of Gene 1) * (Probability of Gene 2)
Variables:
- Probability of Gene 1: The likelihood of inheriting a particular allele combination for the first gene.
- Probability of Gene 2: The likelihood of inheriting a particular allele combination for the second gene.
To calculate the overall probability of a specific genotype, multiply the probabilities of each gene’s allele combination.
What is a Punnett Square?
A Punnett square is a diagram that is used to predict the genotype and phenotype combinations in genetic crosses. It is named after Reginald C. Punnett, who devised the approach. For dihybrid crosses, the square helps to visualize how alleles for two different genes segregate and recombine during inheritance