A study of the after-effect of temperature on the frequency of secondary non-disjunction and the loss of X-chromosomes after the irradiation of Drosophila females

Abstract

The frequency of secondary поп-disjunct;on and the loss of X-chromosomes after treatmentt of Drosophilla XXY females (y/y scS¹ In 49 v sc⁸/Y) with high temperature, X-rays (2 kr) and high temperature after irradiation were investigated. The negative aftereffect on (he frequency of non-disjunction has been estimated. The after-effect en the frequency of the loss of X-chromosome is insignificant. The results support previously proposed hypothesis (Glotoff, 1968b) on the mechanisms of radiation-induced aneuploidy.