5. First spermatocyte, early spireme stage, showing unequal pair of chromosomes.
6-7. First spermatocyte, later growth stages.
8. First spermatocyte, prophase.
9-12. First spermatocyte, metaphase.
13. First spermatocyte, equatorial plate.
14-15. First spermatocyte, anaphase, showing separation of the elements of the unequal pair (l and s).
16. First spermatocyte, daughter plates.
17. Second spermatocytes, equatorial plates.
18. Second spermatocytes, equatorial plates showing V-shaped chromosomes.
19. Second spermatocyte, early anaphase, the small chromosome in metakinesis.