Basal bodies are shorter in Cnb mutants than in WT spermatocytes. (A–D) Basal bodies (BBs) revealed by YFP-ASL fluorescence (A and C, green) and basal body–CLR complexes observed in EM longitudinal sections (B and D) from WT (A and B) and Cnb mutant (C and D) mature spermatocytes. M and D indicate basal bodies derived from mother and daughter centrioles, respectively. Gray bars show the length of the YFP-ASL signal. (E) Basal body length measured from EM longitudinal sections of five mother (red)/daughter (blue) pairs (numbered) from WT and Cnb mutant mature spermatocytes.