The genes for zeste eyes and forked bristles are located on the X chromosome in Drosophila melanogaster. Both genes are recessive. A cross is made between a zeste-eyed female and a forked-bristled male
(a) If 200 offspring from this cross were obtained, present the expected number, sex, genotype, and phenotype in each class of the F1.
(b) If the F1 offspring were crossed to produce 800 flies of an F2 generation, present the expected number, sex, and phenotype in each class. Assume no crossing over.
(a) z+f/z f+ = wild female (100)
z f+/Y = zeste male (100)
(b) z+f/z f+ = wild female (200)
z f+/z f+ = zeste female (200)
z+f/Y = forked male (200)
z f+/Y = zeste male (200)
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