Figure 6.—

Mutations in sticky dominantly suppress position-effect variegation of white. (A) w^m4h/Y; +/TM6 B (+/+). (B) w^m4h/Y; sti^Z3-5829/+. (C) w^m4h/Y;sti³/+. (D) w; DX1-mini-w+; +/TM6 B (+/+). (E) w; DX1-mini-w+; sti^Z3-5829/+. (F) w; DX1-mini-w+; sti³/+. (G–J) Eye pigment from 10–30 males was extracted and quantified by spectrophotometry at 480 nm (see materials and methods). Open bars are +/+ controls and solid bars are sti/+ heterozygotes as indicated. In each case, highly significant differences were seen as indicated. Controls for (K) w^m4h/Y;CyO and w^m4h/Y; Rho1⁷⁰² and (L) w^m4h/Y;+/+ and w^m4h/Y;TM6B/+ show no significant differences in white gene variegation and expression as indicated. All P-values were calculated by a two-tailed t-test assuming unequal variance.