Contains a genomic ovoD1 fragment from 0 to approximately 7.0kb, with a 916bp fragment encoding the en repression domain (EnR) inserted at 5408bp. Encodes ovo- A::EnR and ovo-A- like::EnR fusion proteins.
egg chamber
Females carrying en::ovoD1.EN have early egg chambers, but they degenerate before vitellogenic stages.