BROWN [bw]
Lindsley & Grell, 1972, p. 37
location: 2-104.5.
discoverer: Waaler, l9j15.
references: 1921, Hereditas 2: 391-94.
Sturtevant and Beadle, 1939, An Introduction to Genetics, Saunders, p. 64 (fig.).
phenotype: Eye color light brownish wine on emergence, darkening to garnet. Red pigments lacking; ommochromes at 87 percent normal level (Nolte, 1954, J. Genet. 52: 111-26). Adult testes and vasa colorless. Larval Malpighian tubules pale yellow (Beadle, 1937, Genetics 22: 587-611). Produces white eyes in combination with v, cn, or st. Eye color autonomous when transplanted into wild-type host (Beadle and Ephrussi, 1936, Genetics 21: 230). RK1.
cytology: Placed between 59D4 and 59E1 by Bridges [1937, Cytologia (Tokyo), Fujii Jub. Vol. 2: 745-55], on the basis of its exclusion from the inner inversion of In(2LR)bwV1 = In(2LR)21C8-D1;60D1-2 + In(2LR)40F;59D4-E1 and its inclusion in In(2R)bwVDe2 = In(2R)41A-B;59D6-E1. Based on the study of bw rearrangements, Slatis (1955, Genetics 40: 5-23) tentatively places bw in 59D9, 10, or 11.
other information: Separable into at least two subunits by recombination with bw and bw75 about 0.001 units to the left of bw59 and bw81 (Divelbiss, 1961, Genetics 46: 861).
color figure: P. A. Otto (original)