The Induction by Irradiation with Neutrons of Hereditary Changes in Mice

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Abstract
Out of the 44 F1 animals in the exptl. group 3 were shown to be semi-sterile and there were 1 almost completely sterile [male] and 3 completely sterile [male][male] with abnormal spermatogenesis. There were no cases of complete sterility and probably no cases of semi-sterility in the control, and while there were insufficient F1 [male][male] in the untreated group to furnish an adequate control for the sterile [male][male] in the exptl. group, the control groups of 2 other comparable expts. by Snell and Hertwig show that in F1 [male][male] from untreated parents, sterility is rare. In extensive tests, no evidence was found for the occurrence of recessive visible mutations following irradiation with neutrons.

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