amorphic allele - molecular evidence
A 4698bp genomic fragment, which includes the entire fne open reading frame, has been replaced by a w+mW.hs marker.
abnormal courtship behavior
viable
adult mushroom body beta-lobe
fneKOZ43 mutants are viable, but exhibit a specific and fully penetrant fusion of the β-lobes in their mushroom bodies. Mutant males display reduced courtship indices, but normal short- and long-term courtship memory.