Homozygous lethal or sterile deletion balanced by translocation marked with dpy-10(e128). Heterozygotes are fertile WT and segregate fertile WT, gk3387 homozygotes (sterile adults that tend to explode at vulva), dead eggs (aneuploids) and sterile Dpy-10 mT1 homozygotes. Pick fertile WT to maintain. Reasonably well balanced but not perfect.