When bi::org-1org-1N+org-1T+biC.Scer\UAS.T:Ivir\HA1,T:Hsap\MYC is driven by Scer\GAL4dpp.blk1 small eyes are seen. Mutants also lack aristae. When bi::org-1org-1N+org-1T+biC.Scer\UAS.T:Ivir\HA1,T:Hsap\MYC is driven by Scer\GAL4GMR.PF ommatidial development is impaired, and a dense growth of differently shaped microchaetae is seen in the eye field.