Figure 7.—

The sticky hypomorph mutant enhances silencing at bw^D. The hypomorphic sti^Z3-5829 mutation had no effect on bw^D silencing as a heterozygote (compare A and B); however, 100% (n = 20) of sti^Z3-5829 homozygotes strongly enhanced silencing at the bw^D locus (C). Flies were reared at 18° to minimize rough-eye phenotype and an individual with little or no eye defect is shown. The relevant genotypes are as follows: (A) bw^D/+ ; st/st. (B) bw^D/+ ; sti^Z3-5829/+, st/st. (C) bw^D/+ ; sti^Z3-5829/sti^Z3-5829, st/st.