Our dihybrid cross calculator will help you predict the outcome of genetic crosses between organisms with two different traits.

Dihybrid Cross Calculator

How to Use This Calculator

Enter the genotypes of the two parents into the input fields using two genes with two alleles each (e.g., AaBb). This means each genotype should have a length of four characters, where each pair represents an allele for a different gene.

Once the genotypes are entered, click the calculate button. The results will display the phenotypic ratios of the possible offspring from the dihybrid cross.

How the Calculator Works

This calculator uses the principles of Mendelian genetics to determine the outcomes of a dihybrid cross. It generates the gametes of each parent by finding all possible combinations of alleles for the two genes being considered. Then, it crosses these gametes to produce the genotypes of the offspring.

The calculator then counts the occurrences of each genotype and presents them as phenotypic ratios. A phenotypic ratio is the relative number of offspring with a particular genotype compared to the total number of offspring.

Limitations

This calculator assumes that the genes assort independently and are not linked. It also assumes that each allele has equal viability and chance of being passed on. The actual genetics of an organism may be more complex due to gene linkages, multiple alleles, dominance variations, and other genetic factors not accounted for in a simple dihybrid cross.