Lindsley & Grell, 1972, p. 259
location: 1-33.0.
origin: Spontaneous.
discoverer: Morgan, 10k.
references: Morgan and Bridges, 1916, Carnegie Inst. Wash. Publ. No. 237: 27 (fig.).
Sturtevant and Beadle, 1939, An Introduction to Genetics, Saunders, p. 64 (fig.).
phenotype: Eye color bright scarlet owing to absence of brown ommochrome. Ocelli colorless. The combination v; bw has white eyes. Eye color wild type in genetically v eyes of gynandromorph mosaic for wild type and v tissue (Sturtevant, 1932, Proc. Intern. Congr. Genet., 6th. Vol. 1: 304-7). v eye disks develop wild-type pigmentation when transplanted into wild-type larva (Beadle and Ephrussi, 1936, Proc. Natl. Acad. Sci. U.S. 22: 536-40). The v+ hormone of Beadle and Ephrussi was identified as kynurenine (Butenandt, Weidel, and Becker, 1940, Naturwissenschaften 28: 63-64). Activity of the inducible enzyme (Rizki and Rizki, 1963, J. Cell Biol. 17: 87-92) tryptophane pyrrolase, absent (Baglioni, 1959, Nature 184: 1084-85; 1960, Heredity 15: 87-96). Nonprotein tryptophan accumulated (Green, 1959, Genetics 34: 564-72). Suppressed by alleles at the su(s) locus (Schultz and Bridges, 1932, Am. Naturalist 66: 323-32). Tryptophan pyrrolase of su(s) v differs kinetically from that of wild type (Marzluf). Some brown pigment formed under conditions of partial starvation (Tatum and Beadle, 1939, Biol. Bull. 77: 415-22). Larval Malpighian tubules pale yellow (Brehme and Demerec, 1942, Growth 6: 351-56). RK1.
cytology: Locus in or near 10A1-2 (Green, 1954, Proc. Natl. Acad. Sci. U.S. 40: 92-99).
other information: Pseudoallelism at the v locus demonstrated by recombination between v and v36f in which v is to the left of v36f (Green, 1954).
color figure: P. A. Otto (original)
photograph: P. A. Otto (original)