Figure 1.

Rescued krz¹ homozygous demonstrate a range of antennal structural defects. The rescued krz¹ homozygous adults display variable penetrance and expressivity of antennal structural defects. (A) A w¹¹¹⁸ adult with a wild-type antennal structure. (B) krz¹ homozygote (P{UASkrz}T12/+; krz¹, P{hspGal4}/krz¹), normal antennal structure; this phenotype is the most common and is generally found in flies that are first to eclose (C) krz¹ homozygote antenna with an arista that is bent and has a thicker base. This antenna also has a shortened bulbar third antennal segment. This phenotype is uncommon. (D) krz¹ homozygote with no aristae and a third antennal segment missing many sensilla; this phenotype is rare and is typically found in flies that eclose several days to a week later than the flies that are first to emerge. (E) OR83B-rescued krz¹ homozygote (P{UASkrz}T12/+; P{hspGal4}/krz1, P{Or83b-Gal4}), normal antennal structure; this phenotype is the most common. (F) OR83B-rescued krz¹ homozygote with no aristae and a third antennal segment missing many sensilla; this phenotype is rare.