FRT cassette has been excised, juxtaposing the αTub84B promoter and ftz coding sequences.
adult abdominal segment 2
adult abdominal segment 4
haltere
larval segment
wing | ectopic
39% of mutant first instar larvae show partial segmental deletions. 30% of adults show partial deletion of A4 and/or A2. Also a 3% of adults exhibit haltere to wing transformations.
ftzαTub84B.PA partially rescues ftz11/ftz13