Fig. 2. Meiotic time-course experiment in the rec12 mutant. The morphologies of linear elements in spread and silver-stained nuclei and the timing of cytological events were analyzed in strain ED5. (A) Class I nucleus. Arrowheads show short linear elements; the arrow points to the spindle pole body; `n' indicates the nucleolus. (B) Class IIa nucleus with a network of elements. (C) Several short bundles in a class IIb nucleus. (D) Two class III nuclei showing an abundance of long elements. Bar, 1 µm. (E) Quantitation of the different classes of linear elements. (F) Timing of cytological events as followed by DAPI staining.