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Normal fruit flies have red eyes. Flies with mutations that block the function of the X-linked white gene have white eyes. The wild-type allele is completely dominant to mutant alleles. White-eyed females are mated to red-eyed males. One of the hundreds of female progeny is white-eyed. This white-eyed daughter likely arose from nondisjunction of the sex chromosomes during _________ in the __________. (multiple answers)
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