Jra1 neuroblast clones in the mushroom body have no gross axonal phenotypes.
Jra1/+ flies show no thoracic abnormalities.
Mutant embryos die in mid to late embryogenesis with large anterior and dorsal holes in the cuticle. Mitotic clones in the eye cause no abnormal defects in eye development. Microscopic inspection of tangential sections reveals minor defects, the occasional missing photoreceptor.