In a given strain of fly you are studying the inheritance of

Last updated: 3/17/2023

In a given strain of fly you are studying the inheritance of the body color and wing surface that are assumed to be autosomal traits Assume that each trait is controlled by a single gene with two alleles B and b alleles for the body color gene and W and w alleles for the wing surface gene The parental cross is between a true breeding female fly with yellow body smooth wing and a true breeding male fly with red body and wrinkled wings All the F1 flies have a red body and smooth wings a Taking the dominance pattern into account write the allele phenotype correspondence for body color and wing shape using the symbol B b for body color and W w for wing surface for example B yellow body b red body b Write the parental genotypes female and male and the genotype of the F1 flies c Crossing several pairs of F1 offspring i In the F2 offspring what is the expected red body smooth wings red body wrinkled wings yellow body smooth wings yellow body wrinkled wings ratio ii Suppose that the data below represents the actual numbers you obtain from the cross Compare it to your expected ratio in part i and provide a clear explanation for the discrepancy in case it does not match your expectation Body Color Red Yellow Red Yellow Body Color Wing Surface Red Yellow Red Yellow Smooth Smooth Wrinkled Wrinkled d Assuming the loci of the two genes are on the same chromosome In order to evaluate the distance between the loci you perform a few crosses between the F1 offspring flies and flies with yellow body and wrinkled wings Using the data from the following table calculate the distance between the genes for body color and wing surface Wing Surface Number Smooth Smooth Wrinkled Wrinkled 300 150 150 0 Number 396 102 98 404