Fig. 5. Variability of sperm nuclei in cysts at their maximum elongation. (A,C,E,G) Delhi series; (B,D,F,H) Prunay series. (A,B) Males grown at 21°C; (C–H) males grown at 31°C. The various abnormalities of nucleus elongation and condensation observed at 31°C were found in the two populations but at different frequencies (see text). (A,B) Normal cysts with condensed chromatin in all apical nuclei (21°C); (C,D) rounded nuclei with variable levels of chromatin condensation (31°C); (E,F) irregular-shaped nuclei with variable levels of chromatin condensation (31°C); (G) rounded nuclei located in abnormal position along the cyst (31°C); (H) normal condensation of nuclei located in abnormal position along the cyst (31°C). Scale bar, 10 µm.