The sensitivity pattern for X-ray-induced chromatid aberrations was analysed in primary spermatocytes irradiated at 1 to 11 days diakinesis-metaphase I of meiosis. Using a dose of 300 R (60 R/min) of gamma-rays zygotene (day 9) was found to be the most sensitive and leptotene (day 11) the most insensitive stage. The dose-response to gamma-ray-induced aberrations was evaluated in cells irradiated zygotene. Both the yields of rearrangement as well as the yields of fragments gave a best fit to a quadratic model.
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I.‐D. Adler (1977) studied this question.
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