Question: Question 1. The map below shows the relative positions of four autosomal markers on a normal Dros…


Question 1. The map below shows the relative positions of four autosomal markers on a normal Drosophila autosome. 25.7mu 2.2mu 17.2mu Wild-type males were X-irradiated and then mated to aa,bb, CC, dd females to generate Fi heterozygotes. The phenotype of most of the F1 heterozygotes was wild-type. One of Fi female progeny, whose phenotype was wild-type, was mated to a homozygous recessive male from the true breeding stock. The resulting progeny exhibited the following phenotypic classes, in the numbers indicated: #offlies abcd 91 89 abc+ Total 200 a) What class of X-ray-induced mutation produced the results given in the table above? b) Describe this X-ray induced mutation quantitatively, in terms of map units.

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Question 1. The map below shows the relative positions of four autosomal markers on a normal Drosophila autosome. 25.7mu 2.2mu 17.2mu Wild-type males were X-irradiated and then mated to aa,bb, CC, dd females to generate Fi heterozygotes. The phenotype of most of the F1 heterozygotes was wild-type. One of Fi female progeny, whose phenotype was wild-type, was mated to a homozygous recessive male from the true breeding stock. The resulting progeny exhibited the following phenotypic classes, in the numbers indicated: #offlies abcd 91 89 abc+ Total 200 a) What class of X-ray-induced mutation produced the results given in the table above? b) Describe this X-ray induced mutation quantitatively, in terms of map units.

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