The P{hsp-hh.K} transgene, carrying hhhs.PK, is inserted near to an unidentified enhancer at 15A on the X chromosome.
microchaeta & wing | anterior | proximal
Heterozygotes have an outgrowth on the anterior proximal part of the wing. The triple row on the proximal anterior margin is often interrupted by regions with few sensory bristles, and regions of wing vein L1 are often missing. The anterior outgrowth is more extensive in homozygotes and hemizygotes, and wing vein L2 is bifurcated. In addition, trichomes in the anterior proximal half of the wing are oriented abnormally, turning towards the anterior-most and/or proximal margins. Trichomes in the distal half of the wing are oriented normally. The interruptions in the triple row on the proximal anterior margin often contain no sensory or proximal row bristles in homozygotes or hemizygotes. There is frequently a stretch of double row bristles replacing the triple row bristles immediately adjacent to this region. Costal structures are often missing. The posterior compartment of the wing appears normal. These phenotypes suggest that hhh9D causes abnormal outgrowth in the anterior of the wing, together with a partial mirror-image duplication of the anterior structures.
hhh9D has dorsal row of triple row of wing sensilla phenotype, enhanceable by ptc9
hhh9D has medial row of triple row of wing sensilla phenotype, enhanceable by ptc9
hhh9D has ventral row of triple row of wing sensilla phenotype, enhanceable by ptc9
The hhh9D phenotype is enhanced by reducing the number of copies of ptc+; in hhh9D ptc9 or hhh9D ptc5 double heterozygotes, the area surrounded by the bifurcated wing vein L2 is reduced in size compared to hhh9D single heterozygotes, and a new-vein like structure appears in the anterior proximal region. In hhh9D homozygotes or hemizygotes that are also heterozygous for ptc9, triple row bristles are restricted to the area on the margin where the plexated vein L2 terminates. The vein-like structure in the anterior proximal region is broader than in hhh9D ptc9 or hhh9D ptc5 double heterozygotes, and is associated with campaniform sensilla, a characteristic of wing vein L3.