The <i>mus</i>309 mutation, defective in DNA double-strand break repair, increases the frequency of X-ray-induced somatic crossing over in <i>Drosophila melanogaster</i>, but the effect is not dose-rate dependent
Abstract:Effect of a 1000 R dose of hard X-rays, with two different dose-rates viz. 300 and 1000 R/min on somatic crossing over in the X chromosome of Drosophila melanogaster was studied in two different genotypes. Irradiation was given during the first-instar larval stage of the development. In the control crosses the flies carried wild-type autosomes, but in the experimental crosses the 3 rd chromosomes carried a DNA double-strand break repair deficient mus309 mutant gene constitution. As expected, the frequency of X… Show more
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