Mutations of Rm62
increase the number of mutant bristles.
Position-effect variegation and effect of variegation modifiers on expression of Sb in T(2;3)SbV studied.
SbV/+ has mixture of wild-type and Sb bristles. In X/X/Y female and X/Y/Y male, bristles nearly all Sb. In X/0 male, bristles usually all wild type. SbV/Sb and homozygous SbV are lethal. RK1A. weak allele homozygous lethal