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. If 200 offspring from this cross were obtained,
what is the expected offspring's phenotype and sex?
A) 100 forked female; 100 zeste male
B) all wild type
C) 50 wild female, 50 forked female; 50 zeste forked male, 50 zeste male
D) 100 wild female; 100 zeste male
E) 100 zeste female; 100 zeste forked male
Answer: D
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