Exhibits reduced lateral branching in the dorsal cluster of embryonic dendrites. Between 15 and 17 hours after egg laying (AEL), the number of immature lateral branches and the direction of extension seem to be roughly normal, however between 19 and 21 hr AEL, the lateral dendrites start to retract, consequently there is a reduced number of lateral branches, although their length and orientation stay roughly normal. This phenotype is seen in about 85% of embryos. Mutants show no gross defects in axonal outgrowth in the PNS or CNS or anterior-posterior or dorsal-ventral patterning. The development of epidermis and muscle patterning also appears to be normal.