In spermatogenesis, which type of cells undergo meiosis?

During spermatogenesis, the cells that undergo meiosis are spermatocytes. Specifically, these are the primary spermatocytes, which undergo the first meiotic division to produce secondary spermatocytes. These secondary spermatocytes then undergo meiosis II to produce spermatids.

Spermatogonia, the stem cells located at the periphery of the seminiferous tubules, divide by mitosis to produce more spermatogonia or to differentiate into primary spermatocytes. Spermatids, on the other hand, are the result of meiotic division but do not undergo meiosis themselves; instead, they mature into spermatozoa through a process called spermiogenesis. Sertoli cells play a supportive role in spermatogenesis by providing nourishment and structural support, but they do not undergo meiosis.

Therefore, the correct answer is that spermatocytes are the ones that undergo meiosis in the process of spermatogenesis.