The posterior pigment band of each abdominal tergite is expanded anteriorly in heterozygotes, such that the tergite is totally black. The posterior pigment band of each abdominal tergite is expanded anteriorly compared to wild-type in biQd-1E1/biQd-1E7 transheterozygotes and patches of unpigmented posterior hairy zone (PHZ)-like cuticle are seen.