male sterile
aster
Nebenkern
nucleus & spermatid
spermatid
Y chromosome loop
Mutant spermatocytes show an extreme reduction of the kl-3 Y-loop compared to wild type. The mutant testes have a high frequency of irregular spermatids with variably sized nuclei and Nebenkern. Cells undergoing meiotic divisions often lack asters.
ms(3)Z3741Z3741