Lindsley & Grell, 1972, pp. 108-109
discoverer: Bridges, 16c4.
references: Bridges and Morgan, 1923, Carnegie Inst. Wash. Publ. No. 327: 161 (fig.). Morgan, Bridges, and Sturtevant, 1925, Bibliog. Genet. 2: 170 (fig.), 227. Nash, 1965, Genet. Res. 6: 175-89.
phenotype: Bristles, especially postverticals and abdominals, missing. Bristle sockets present at some sites, not at others. Veins L4 and L5 do not reach wing margin; occasionally true of L2 also. Eyes larger than wild type; body color somewhat paler. Lees and Waddington [1942, Proc. Roy. Soc. (London), Ser. B. 131: 87-110 (fig.)] show that trichogen cell forms a socket instead of a bristle at some sites. Interactions with other mutants studied by House (1953, Genetics 38: 199-215, 309-27; 1959, Genetics 44: 516; 1955, Anat. Record 122: 471; 1959, Anat. Record 134: 581-82). H suppresses wing notching of N, fa, fano, and nd; enhances Ax, and enhances eye effect of sp1; H removes more bristles in combination with sp1 (House, Von Halle). Shows some superadditive interaction with en, ci, ciW and ciD relative to degree of L4 interruption. L2 interruption augmented in combinations with ve and ri; L3 interruption augmented in combinations with ve and tt. Triploid, H/+/+, intermediate between wild type and H/+. H/H/+ most extreme type, with bristles absent from head, thorax, and abdomen [Gowen, 1933, Am. Naturalist 67: 178-80 (fig.)]. Homozygous lethal. RK1.
cytology: Salivary chromosomes normal.
color figure: P. A. Otto (original)
b & w figure: From Bridges and Morgan, 1923, Carnegie Inst. Wash. Publ. No. 327: 161 (original drawn by Edith M. Wallace)