Final answer:
Hybrid dysgenesis occurs under certain crosses involving sex-linked traits, such as Drosophila eye color. In these crosses, the phenotypes of the offspring depend on whether the recessive trait was expressed by the male or the female in the parental generation.
Step-by-step explanation:
Hybrid dysgenesis occurs under certain crosses involving sex-linked traits, such as Drosophila eye color.
In these crosses, the phenotypes of the offspring depend on whether the recessive trait was expressed by the male or the female in the parental generation.
For example, when a male Drosophila with the white-eye phenotype is crossed with a homozygous red-eyed female, all members of the F1 generation exhibit red eyes.
The F1 females are heterozygous and the males are XWY.
Subsequent crosses between these individuals produce different genotypic and phenotypic outcomes.