University of Illinois at Chicago Phenotype Numbers Report
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In Drosophila, the grape eye color is produced by an autosomal gene (Grape, G), which is dominant to the wild-type red eye color. Another sex-linked recessive gene (white, w) produces the white eye color. The effect of the Grape gene is epistatic to all other eye colors. In a cross between a pure breeding Grape female to a pure breeding white male (all other genes are homozygous wild type).
A. What are the phenotypes of the F1 males and F1 females?
F1 male phenotype [1]
F1 female phenotype [2]
B. In a F1 X F1 intercross, 800 progenies were produced. How many progenies do you expect to see in each of the following phenotypes?
Grape eyed male [3]
Grape eyed female [4]
Red eyed male [5]
Red eyed female [6]
White eyed male [7]
White eyed female [8]
