Mutant spermatocytes show an extreme reduction of the kl-3 Y-loop compared to wild type. Other aspects of spermatogenesis are unaffected except that sperm are non-motile.
lup-4HA10/lup-4HA30 males have defects in the kl-3 Y-loop and have immotile sperm.
Reduced kl-3 Y chromosome lampbrush loop.