Homozygotes can molt to the third instar and eventually die primarily as pupae. A few adult survivors do survive.
Almost 50% of homozygotes moult into third instar larvae and pupae. Both moults are delayed compared to heterozygotes. The remaining 50% of homozygotes survive at the second larval stage for an extended time period and then appear to moult directly into pupae. Very few homozygous adults eclose, those that do have no obvious morphological defects. The larval moulting delay in homozygotes is rescued by 20-hydroxyecdysone.