Expression of GSd233^GSd233 under the control of Scer\GAL4^109(2)80 results in defects in the dendrites of dorsal cluster dendritic arborisation (da) neurons in third instar larvae: dendrite growth is reduced in the class II da neurons, dendrite morphology is defective in the class III da neurons and dendrite growth and branching are reduced in the class IV da neurons.

Isolated RP2 neuron clones expressing GSd233^GSd233 under the control of Scer\GAL4^Act5C.PP (clones generated using the Scer\FLP1^eve.RN2 line) show altered distribution of dendrites in the dendritic field at 25-31 hours after egg laying: the number of dendrites targeted to posterior regions is increased, the number targeted to medial regions is decreased and the number targeted to lateral regions is increased.

A number of defects are seen in the Fas2-positive axon bundles in the ventral nerve cord of embryos expressing GSd233^GSd233 under the control of Scer\GAL4^scrt-11-6, including missing or disrupted axon bundles, fused axon bundles and axons which are misplaced within the connective.