Fig. 9. ife-1(RNAi) worms are able to produce sperm if the period of spermatogenesis is not abbreviated by a switch to oogenesis. Fluorescence micrographs of intact adult gonad arms stained with Hoechst 33342. The genotypes of gonads are above the panels. d, distal portion of each arm; sp, sperm. Mature-looking sperm are seen in each gonad arm. Scale bar: 10 µm.