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Question: A male Drosphila melangaster is genotypically e^+/e^-, where e (ebony) is an autosomal gene. Of the four gametes produced by a single meiosis, how many of them will carry borht the e^- allele and the Y chromosome?
a) None
b) 1/4
c) 2/4
d) Either none or 1/4
e) Either none or 2/4, but not 1/4
Question: In the fruit fly Drosophila, ebony body (e) is recessive to normal body E. Suppose an Ee female and an ee male are crossed to each other. Among 130 progeny, how many flies and of what phenotypes are expected?
Assume that the D and M genes are on the same chromosome, but they are separated by one hundred map units. You make the following cross: DM / dm x dm / dm.
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