Weak allele. Rare adult escapers of hypomorphic allelic combinations show a range of uncoordinated behaviors.
Fas2-positive axons are seen to cross the midline in comm6 embryos which also carry Khc::Ggal\MLCKKA.ftz. The penetrance of the phenotype is increased as the number of copies of Khc::Ggal\MLCKKA.ftz is increased.
Δ2-3-induced revertants of the comm mutant phenotype have lost the P-element insertion.