BENT [bt]
Lindsley & Grell, 1972, p. 36
location: 4-1.4 [mapped in diplo-4 triploids by Sturtevant (1951, Proc. Natl. Acad. Sci. U.S. 37: 405-7)].
origin: Spontaneous. First mutant found on chromosome 4.
discoverer: Muller, 1914.
references: 1914, J. Exptl. Zool. 17: 325-36. Morgan, Bridges, and Sturtevant, 1925, Bibliog. Genet. 2: 216 (fig.), 219. Bridges, 1935, Biol. Zh. (Moscow) 4: 401-20.
phenotype: Wings held out at base and bent sharply backward. Rear legs often lumpy at first tarsal joint. May have one to four "preleg" or "first ventral" bristles on ventral surface of thorax anterior to first pair of legs, in space otherwise devoid of bristles or hairs. Overlaps wild type at 25oC, very much at 19o, and little if any at 29oC (Metz, 1923, Proc. Soc. Exptl. Biol. Med. 20: 305-10). RK2 at 28oC.
color figure: P. A. Otto (original)
b & w figure: Morgan, Bridges and Sturtevant, 1925, The Genetics of Drosophila, Bibliog. Genet. 2: 1-262 (original drawn by Edith M. Wallace)