Heterozygotes are WT and segregate WT, lin-25 homozygotes (which are temperature sensitive: at 25C adult hermaphrodites are vulvaless, at 15C 8% of adult hermaphrodites are vulvaless), and scc-3 homozygotes which are Pvl and Sterile (vulval morphogenesis defects and defects in sister-chromatin cohesion).