Chromosome Variation 245 ?. A B C D RS TUVWXEFG b. AUVB.CDEFG c. AB.TUVFG RS CDE

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Chromosome Variation 245 ?. A B C D RS TUVWXEFG b. AUVB.CDEFG c. AB.TUVFG RS CDEWX d. AB.CWG RS TWX 23 The Notch mutation is a deletion on the X chromosome RS TUVDEFX of Drosophila melanogaster. Female flies heterozygous for Notch have an indentation on the margins of their wings; Notch is lethal in the homozygous and hemizygous conditions. The Notch deletion covers the region of the X chromosome that contains the locus for white eyes, an X-linked recessive trait. Give the phenotypes and proportions of progeny produced in the following crosses. a. A red-eyed Notch female is mated with a white-eyed b. A white-eyed Notch female is mated with a red-eyed c. A white-eyed Notch female is mated with a white-eyed male. male male. The green-nose fly normally has six chromosomes:two metacentric and four acrocentric. A geneticist examines 24. f an odd-looking green-nose fly and

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Chromosome Variation 245 ?. A B C D RS TUVWXEFG b. AUVB.CDEFG c. AB.TUVFG RS CDE

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