Lindsley & Grell, 1972, pp. 150-151
discoverer: Morgan, 10h.
references: Morgan and Bridges, 1916, Carnegie Inst. Wash. Publ. No. 237: 26 (fig.).
phenotype: Wing size reduced; only slightly longer than abdomen and with normal proportions. Angle between L2 and L5 reduced. Wings dark gray and less transparent than normal. Wing cells smaller than normal (Dobzhansky, 1929, Arch. Entwicklungsmech. Organ. 115: 363-79). In poor cultures, wings may become divergent and stringy. Cell expansion inhibited in prepupae and pupae [Waddington, 1940, J. Genet. 41: 75-139 (fig.)]. Different m mutants complement slightly; m/dy is wild type. RK1.
cytology: Locus probably lies in 10E1-2 and extends to the right for a short distance. Salivary chromosome studies by Demerec and Sutton show the locus to lie in region 10C3 to 10E2 (Demerec, Kaufmann, Fano, Sutton, and Sansome, 1942, Carnegie Inst. Wash. Year Book 41: 191); however, Dorn and Burdick (1962, Genetics 47: 503-18) showed that Df(l)m259-4 (the basis for the Demerec and Sutton location) is deficient for only part of the m locus, and some alleles are located by recombination to the right of the deficiency.
other information: The miniature-dusky region has been divided into four recombinationally separable sites (Dorn and Burdick 1962); m occupies the third site from the left. No reverse mutations among 2 x 105 progeny of m/m females (Gagné).
color figure: P. A. Otto (original)
b & w figure: Morgan and Bridges, 1916, Carnegie Inst. Wash. Publ. No. 237 (original drawn by Edith M. Wallace)
photograph: P. A. Otto (original)