Fig. 9. Reduced centrioles in unc mutant spermatocytes. Transverse and longitudinal sections of centrioles in (A) wild-type (y w) and (B) mutant (y w unc) spermatocytes show similar ultrastructure with microtubule triplets, but both the proximal and distal sections of mutant centrioles are shorter. (C) Lengths of the proximal and distal parts of longitudinally sectioned centrioles. Asterisks indicate the centrioles shown in A and B.