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 wild female; 100 zeste male
B)100 forked female; 100 zeste male
C)100 zeste female; 100 zeste forked male
D)50 wild female,50 forked female; 50 zeste forked male,50 zeste male
E)all wild type

Question

Quizplus · Accepted Answer

The zeste-eyed female (homozygous recessive) crossed with a forked-bristled male (hemizygous recessive) will produce 100 wild-type females (heterozygous for both traits) and 100 zeste males (hemizygous for the zeste trait).

The Genes for Zeste Eyes and Forked Bristles Are Located