Deletion of 1.4kb that removes approximately 400bp of the 3' end of the fd3F open reading frame.
Imprecise excision of P{EP}fd3FEP1198 deletes the 3' end of the fd3F transcription unit.
Homozygous adults perform very poorly in a climbing assay.
Mutant flies show no sound-evoked compound action potentials in the projections of Johnston's organ neurons in the antennal nerve. Analysis of the mechanical response of the antennal sound receiver to tones of different intensities indicates that chordotonal organ cilium motility is lost.
The chordotonal cilium of the Johnston's organ lacks the dynein outer and inner arms in the proximal region.
Cilia of embryonic chordotonal neurons show abnormal dilation.