A new recessive, sex-linked, nonlethal in the homozygote, wing mutation in Drosophila virilis was studied using a hybridological assay, light microscopy, and transmission electron microscopy. The mutants have abnormally small wings; the phenotype is attributed to a cell-autonomous reduction in the size of the epidermal cells of the differentiating wing. The phenotype is also characterized by abnormally oriented wing hairs, wavy wing edge, temperature sensitivity, and some abnormalities in the wing veins.
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