Lindsley & Grell, 1972, p. 54
discoverer: Clausen, 20i8.
references: 1924, J. Exptl. Zool. 38: 423-36.
phenotype: Eye color bright red, like v or st. Ocelli colorless. Eye color darkens with age, but ocelli remain colorless. Larval Malpighian tubes pale yellow (Beadle, 1937, Genetics 22: 587-61l). Nonautonomous in development of pigment of transplanted eye disks (Beadle and Ephrussi, 1936, Genetics 21: 230), cn blocks conversion of kynurenine to 3-hydroxykynurenine, which has been identified as the cn+ hormone (Butenandt, Weidel, and Schlossberger, 1949, Z. Naturforsch. 4b: 242-44). RK1.
cytology: Proximal to 44C, based on its inclusion in Dp(2;3)P32 = Dp(2;3)41A;42D-E;44C-D;89D7-E1 (E. B. Lewis).
color figure: P. A. Otto (original)
photograph: P. A. Otto (original)