| As daughter cells of spermatogonia, the primary spermatocytes reside just apical to the layer of spermatogonia. |
| At the apical end of the testes, stem cells divide to produce a spermatogonial cell that undergoes four rounds of mitosis to produce 16 primary spermatocytes. |
| After 5 weeks, oligospemia was observed, and after 10 weeks, testicular atrophy accompanied by the loss of sperm cells and spermatocytes was confirmed. |
| In sexual reproduction, spermatocytes develop from the transformation of choanocytes, and oocytes arise from archeocytes. |
| In human pachytene spermatocytes, SUMO-1 and another factor that binds to DNA, known as a histone, show discrete patterns. |
| Mammalian spermatogenesis occurs continuously with individual maturation of sperm through meiotic division of spermatocytes. |
