Lindsley & Grell, 1972, pp. 216-217
discoverer: Bridges, 23d21.
references: Dobzhansky, 1930, Z. Induktive Abstammungs-Vererbungslehre 54: 427-57 (fig.).
phenotype: Bristles of Sb/+ less than one-half normal length, and somewhat thicker than wild type. Homozygous lethal. Sb/sbd2 more extreme than Sb/+. sbd2 Sb behaves as a recessive sbd allele but is homozygous lethal. Classifiable in single dose in triploids. Developmental studies by Lees and Waddington [1943, Proc. Roy. Soc. (London), Ser. B 131: 87-110 (fig.)] show that trichogen is shifted to lie more or less on the level of the tormogen. RK1.
cytology: Salivary chromosomes normal (Morgan, Bridges, and Schultz, 1937, Carnegie Inst. Wash. Year Book 36: 301). Placed in 89B4-5, probably in 89B4 by Lewis (1951, Cold Spring Harbor Symp. Quant. Biol. 16: 159-74). These probably correspond to 89B9-10 on Bridges's revised map.
other information: Sb is pseudoallelic to and lies 0.01 to 0.03 unit to the right of sbd2. Deficiency for the Sb locus produces no dominant phenotype (Lewis, 1951).
color figure: P. A. Otto (original)
b & w figure: Edith M. Wallace, unpublished