Abstract
MR. A. STURTEVANT has experimented (Publication 264, Carnegie Institution of Washington, 1918, pp. 1–68, 1 plate) with a mutant race of the fruit-fly, Drosophila. melanogaster (ampelophila), with the particular object of determining the effects of selection. The mutant character in question is known as Dichæt; it appeared in 1915 in a single female which had wings extended and bent backwards near the base, and with only two dorso-central bristles instead of the usual four. This “Dichæt” character behaves as a dominant, and it appears that the factor or gene corresponding with it is located “in the third chromosome, approximately five units to the left of pink.” Dichæt-flies are more variable in bristle-number than are non-Dichæts. The variability is partly environmental, partly genetic.
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Experimental Studies of Selection . Nature 103, 354 (1919). https://doi.org/10.1038/103354b0
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DOI: https://doi.org/10.1038/103354b0