In early phase division of spermatogonia by?
**Core Concept**
Spermatogenesis is the process of sperm production in males, involving the transformation of spermatogonia into mature spermatozoa. The early phase of spermatogenesis includes the division of spermatogonia, which are the precursor cells of sperms.
**Why the Correct Answer is Right**
In the early phase of spermatogenesis, spermatogonia undergo mitotic division to produce more spermatogonia, a process known as spermatogonial multiplication. This is necessary to increase the number of spermatogonia that will eventually differentiate into spermatocytes. The correct answer is **mitosis**, as it is the type of cell division that occurs in the early phase of spermatogenesis.
**Why Each Wrong Option is Incorrect**
* **Option A:** Meiosis is incorrect because it occurs later in spermatogenesis, when spermatocytes undergo cell division to produce haploid spermatids.
* **Option B:** Apoptosis is incorrect because it is a process of programmed cell death, which occurs in some cells during spermatogenesis, but not in the early phase division of spermatogonia.
* **Option C:** G1 phase is incorrect because it is a stage of the cell cycle that occurs before DNA replication, and is not the type of cell division that occurs in the early phase of spermatogenesis.
**Clinical Pearl / High-Yield Fact**
It's worth noting that spermatogenesis is a continuous process that occurs throughout a male's lifetime, with approximately 1,500 spermatozoa produced every second.
**Correct Answer: A. Mitosis**