Suppose a wild-type male fruit fly is treated with x-rays., Ask an Expert

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Suppose a wild-type male fruit fly is treated with X-rays. It is then crossed to an ordinary wild female carrying no known mutant alleles. If a recessive, X-linked lethal is induced in any of the radiated X chromosomes, what would be the effect on the sex ratio:
a) in the first generation?
b) in the second generation?

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