Radiosensitivity of Oocytes of Drosophila

ISSN： 1362-3095

Source： International Journal of Radiation Biology, Vol.21, Iss.5, 1972-05, pp. : 455-463

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Abstract

Mature oocytes of triploid females of Drosophila melanogaster are more radiosensitive than those of diploid females. In the progeny of XX/Y females, more dominant lethals are expressed in individuals resulting from XX-bearing pronuclei than in individuals resulting from Y-bearing pro-nuclei. The results support the hypothesis that the amount of radiation-induced lethality in mature oocytes is proportional to the amount of chromosome material irradiated in the oocyte nucleus and tested after the formation of the maternal pro-nucleus. This indicates that in mature oocytes the chromosomes represent the most important target for x-ray-induced lethality.

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