The Genes for Zeste Eyes and Forked Bristles Are Located

question 29

Multiple Choice

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

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