Coexpression of dppScer\UAS.cFa and vgScer\UAS.cKa, both under the control of Scer\GAL4bi-md653, leads to an enhancement of the haltere-to-wing transformation seen when either transgene is expressed alone. Almost all haltere cells are transformed to wing-type cells as seen by the large number of bristles and trichomes. The phenotype is fully penetrant in pharate adults and flies expressing both transgenes are lethal at the pharate adult stage.
Flies expressing wgScer\UAS.cAa under the control of Scer\GAL4ey.PH do not show photoreceptor development at the posterior of the eye disc. This phenotype is not rescued if the flies are also co-expressing dppScer\UAS.cFa. Flies expressing both dppScer\UAS.cFa and wgScer\UAS.cAa under the control of Scer\GAL4Act5C.PP also do not show photoreceptor development at the posterior margin of the eye disc. The ectopic photoreceptor differentiation seen in flies expressing dppScer\UAS.cFa under the control of Scer\GAL4ey.PH is not inhibited if the flies are also co-expressing wgScer\UAS.cAa. eyg1/Df(3L)iro-2 hemizygous eye discs completely lack photoreceptors. Photoreceptor development in these discs is not rescued by dppScer\UAS.cFa expressed under the control of Scer\GAL4dpp.PH.