Poorly growing strain; most homozygotes fail to reach adulthood, and those that do are Egl. smg suppressable and tends to accumulate second site mutations that suppress the Mua phenotype and restore vigorous growth.

ncIs2 [pH20::GFP + pBlueScript]. Heterozygotes are WT and segregate WT, Uncs, and animals with muscle attachment defects and ventral cord displacement and detachment which arrest in larval development. Not well balanced. Neurons visualized with ncIs2.