When bi::org-1biN+biT+org-1C.Scer\UAS.T:Ivir\HA1,T:Hsap\MYC is driven by Scer\GAL4dpp.blk1 normal or slightly enlarged eyes are seen. A transformation of the arista to leg tissue is seen. When bi::org-1biN+biT+org-1C.Scer\UAS.T:Ivir\HA1,T:Hsap\MYC is driven by Scer\GAL4GMR.PF ommatidial development is impaired.