SENSITIVITY OF THE MOUSE OOCYTES TO THE INDUCTION OF TRANSLOCATIONS BY IONIZING RADIATIONS

Abstract

Female mice from the C57B1 strain received 0, 50 or 200 R whole body X-irradiation and were mated to control males from the same strain. Using an air-drying technique, the testes of their F₁males were analysed for the presence of chromosome rearrangements, but no translocation congurations were observed in the dividing spermatocytes of the 100 control males and of the 185 F₁sons from irradiated females.Since meiotic preparations made one day after exposure of the females to X-irradiation showed the presence of chromosome rearrangements in some first meiotic metaphases, it could be inferred that the absence of translocated offspring after maternal X-ray exposure probably resulted from germinal selection.