Embryos expressing DfdScer\UAS.cLa under the control of Scer\GAL4arm.PS have ectopic mouth hook fragments and cirri. When the Scer\GAL4arm.PS driver is provided paternally, development of these ectopic maxillary structures is restricted largely to the labial and thoracic segments. When the Scer\GAL4arm.PS driver is provided maternally, development of these ectopic maxillary structures occurs throughout the trunk, including the abdominal segments. The number and segment-specific features of the thoracic and abdominal cuticle develop nearly normally in both cases.
Strong DfdScer\UAS.cLa expression in the antenna disc driven by Scer\GAL4dpp.blk1 causes ingrowth of antennal disc tissue and produces adults with antennal third segments that are enlarged but not transformed into leg structures.