When dsfScer\UAS.T:Hsim\VP16 is driven by Scer\GAL4Act5C.PI or Scer\GAL4Dll-md23 an embryonic lethal phenotype is seen. When driven by Scer\GAL4elav.PLu animals die as embryos or first instar larvae. When driven by Scer\GAL4h-1J3 animals die as first instar larvae. When dsfScer\UAS.T:Hsim\VP16 is driven by Scer\GAL4Alk.6.5 animals die as pharate adults with crooked hind legs and foreshortened middle legs. When dsfScer\UAS.T:Hsim\VP16 is driven by Scer\GAL4dpp.blk1 no defects are detectable. When driven by Scer\GAL4GMR.PF adults are viable and fertile, with moderate ommatidial disruption, bristle and pigment loss.