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Biol Bull 120: 8-10. (February 1961)
© 1961 Marine Biological Laboratory
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X-RAY EFFECTS ON SEX OF PROGENY IN SCIARA COPROPHILA

HELEN V. CROUSE 1

1 Department of Botany, Columbia University, New York 27, New York

Among the progeny of female-producers bred to irradiated males there appear an appreciable number of exceptional sons, all of which are matroclinous for their sex-linked genes. Among the progeny of male-producers bred to irradiated males no exceptional daughters occur. Finally, when female-producers are irradiated and bred to stock males, exceptional sons appear in the progeny and all of them are patroclinous for their sex-linked genes. These observations, taken collectively are interpreted as follows: irradiation of sperm or of oöcytes can result in the transmission to the zygote of an irregular number of sex chromosomes; if, following elimination, a viable somatic complement (XX or XO) obtains, the embryo will differentiate accordingly into female or male.




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