Application:
10.2.A1: Completion and analysis of Punnett squares for dihybrid traits Objectives:
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A dihybrid cross determines the genotypic and phenotypic combinations of offspring for two particular genes that are unlinked
The easiest way to work out potential gamete combinations in a dihybrid cross is to use the FOIL method:
- Because there are two genes, each with two alleles, there can be up to four different gamete combinations
The easiest way to work out potential gamete combinations in a dihybrid cross is to use the FOIL method:
- FOIL = First / Outside / Inside / Last
Example of a Typical Dihybrid Cross
Skill:
10.2.S1: Calculation of the predicted genotypic and phenotypic ratio of offspring of dihybrid crosses involving unlinked autosomal genes
Objectives:
10.2.S1: Calculation of the predicted genotypic and phenotypic ratio of offspring of dihybrid crosses involving unlinked autosomal genes
Objectives:
- Determine the predicted genotype and phenotype ratios of F1 and F2 offspring of dihybrid crosses.