6.2.5 Predicting Inheritance: Dihybrid Crosses

Question 1

What do dihybrid crosses look at and how do you present them?

Answer 1

Dihybrid crosses look at how the alleles of two genes transfer across generations
I.e. dihybrid crosses can be used to show the inheritance of two different characteristics in an individual

The genetic diagrams for both types of crosses are very similar

For dihybrid crosses, there are several more genotypes and phenotypes involved

When writing out the different genotypes, write the two alleles for one gene, followed immediately by the two alleles for the other gene. Do not mix up the alleles from the different genes
For example, if there was a gene with alleles Y and y and another gene with alleles G and g an example genotype for an individual would be YyGg