A diagram of gonad organization in fli-1. Schematic diagram of the organization of the pachytene meiotic region of the germ cell in wild-type (A) and fli-1 mutants (B). In wild-type, germ cell plasma membrane protrudes between cortical nuclei and partially envelops the, forming the "T" structure. Sheath cells protrude superficially between nuclei. In fli-1(ky535), nuclei in the rachis are enveloped with germ cell plasma membrane, and sheath cells protrude deeply into the rachis.