Summary
The rate of X-ray induction of dominant lethals in the sperm of the Oregon-R stock ofDrosophila melanogaster is, at low doses, 12% per 1000 r. for death in the embryo stage, and 20% per 1000 r. for death at any stage between the zygote and the adult. At higher doses of X-rays both rates increase. Over the whole dose range, therefore, the doseaction curve does not fit a single-hit type of action, though this is approximated at low doses.
The rate of depression of the sex ratio of females to males, founded on our own and other data, is about 2·5% per 1000 r.
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Lea, D.E., Catcheside, D.G. The rate of induction of dominant lethals inDrosophila melanogaster sperm by X-rays. Journ. of Genetic 47, 1–9 (1945). https://doi.org/10.1007/BF02989033
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DOI: https://doi.org/10.1007/BF02989033