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In Drosophila, a cross was made between a female heterozygous for the recessive genes ct (cut wings) and se (sepia-coloured eyes) and a sepia male. Among their female progeny, half the phenotypes were wild-type and half sepia. Among their male progeny were 1/4 wild-type, 1/4 cut, 1/4 sepia, and 1/4 cut and sepia. Is either of these genes sex-linked? What are the genotypes of the parents and their offspring?

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