Abstract
ON three independent occasions an exceptional trait has been recovered in collections from Nature of females of D. bifasciata: in Pavia in 19431 and 1947, and in Mergozzo (Lago Maggiore) in 1947. This trait expresses itself in an abnormal sex-ratio of offspring from females mated to any type of male. By analogy with previously described cases2, the character has been designated as ‘sex-ratio’. The strain used in the experiments discussed here originated from the 1947 collection in Pavia. The behaviour of this stock can be summarized as follows.
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Buzzati-Traverso, A., D.I.S. No. 14, 49 (1941).
Morgan, Th., Bridges, C. B., and Sturtevant, A. H., Bibliograph. Genetica, 2, 1 (1925).
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MAGNI, G. ‘Sex-Ratio’: a Non-Mendelian Character in Drosophila bifasciata. Nature 172, 81 (1953). https://doi.org/10.1038/172081a0
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DOI: https://doi.org/10.1038/172081a0
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