From a mating between two normal-winged Drosophila, 27 dumpy-winged and 79 normal-winged offspring were produced. a) What is the mode of inheritance of the dumpy-winged gene? Show how you obtained your answer, giving the genotypes and phenotypes of the parents and expected genotypic and phenotypic ratios of the offspring. Compare to the observed numbers. b) In a cross between a dumpy-winged fly and one of the parents, how many normal-winged flies would be expected among 120 offspring?
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Given: - 27 dumpy-winged offspring - 79 normal-winged offspring Since normal-winged offspring were produced, the dumpy-winged gene must be recessive. Let's use D for normal wing (dominant) and d for dumpy wing (recessive). Let's denote the genotypes of the Show more…
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