All bristles and hairs of heterozygote shortened and twisted. Resembles sn1. Viability and fertility excellent; classification easy. Homozgyote has more extreme bristle and hair effects. Expression much reduced in flies raised at 18oC (Hardy). Ki+ an excellent marker for cuticular clones in Ki1/+ heterozygotes. Viability somewhat reduced but fertility near normal. RK1 as heterozygote.