Lindsley & Grell, 1972, p. 108
location: 3-26.5.
origin: Spontaneous.
discoverer: Mohr, 18l11.
references: 1922, Z. Induktive Abstammungs-Vererbungslehre 28: 17.
Bridges and Morgan, 1923, Carnegie Inst. Wash. Publ. No. 327: 202 (fig.). Morgan, Bridges, and Sturtevant, 1925, Bibliog. Genet. 2: 214 (fig.), 227. Neel, 1941, Genetics 26: 52-68 (fig.).
phenotype: Extra hairs on scutellum, along veins, on pleurae, and on top of head. Additional hairforming cells present in 19-hr pupa (Lees and Waddington, 1942, DIS 16: 70). Interacts synergistically with pyd and Hw or Hw variegateds [e.g., In(1)sc8]; In(1)sc7 suppresses h (Steinberg, 1942, DIS 16: 68; Neel, 1941). RK1.
cytology: Placed in salivary chromosome region between 66D2 and 66E1, on basis of its inclusion in Df(3L)h100.390 = Df(3L)66D2-5;66D14-E1 (Ward and Alexander, 1957, Genetics 42: 42-54).
other information: As with ci+, expression of h+ may be altered in the direction of h by rearrangements with breaks in the vicinity of the h locus [Dubinin and Sidorov, 1934, Biol. Zh. (Moscow) 3: 307-31]. Unlike the ci case, however, rearranged h chromosomes do not show evidence of altered gene action (Stern, 1944, DIS 18: 56). Shown by both Sturtevant and Rasmussen to recombine with and lie to the right of h2.
color figure: P. A. Otto (original)
b & w figure: Bridges and Morgan, 1923, Carnegie Inst. Wash. Publ. No. 327: 202 (original drawn by Edith M. Wallace)