To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 1. Wild type male meiosis generates four spermatids. Tubulin-GFP (green) and ChromatinmCherry (red). Sperm-specific glycogen synthase kinase 3 is required for sperm motility and the post-fertilization signal for female meiosis II in Caenorhabditis elegans Rudra Prasanna Banerjee, and Martin Srayko Development 2022. 149:None-None; doi: 10.1242/dev.200229 Download Original Video