In fruit flies, yellow body (y) is recessive to gray body , and the trait of body color is inherited on the X chromosome. Vestigial wing (v) is recessive to full-sized wing (v⁺), and the trait has autosomal inheritance. A cross of a male with yellow body and full wings to a female with gray body and full wings is made. Based on an analysis of the progeny of the cross shown below, determine the genotypes of parental and progeny flies.
[Table below appears at this point containing crosses and results]
Phenotype Number of Number of
Males Females _
Yellow body, full wing 296 301
Yellow body, vestigial wing 101 98
Gray body, full wing 302 298
Gray body, vestigial wing 101 103 _
800 800
2. Mendel's Laws of Inheritance
Sex-Linked Genes