Which is the correct sequence in spermatogenesis?

Options

A. Spermatogonia `rarr` Spermatids `rarr` Secondary spermatocytes `rarr` Primary spermatocytes `rarr` Sperms
B. Spermatogonia `rarr` Spermatids `rarr` Primary spermatocytes `rarr` Secondary spermatocytes `rarr` Sperms
C. Primary spermatocytes `rarr` Secondary spermatocytes `rarr` spermatids `rarr` Spermatogonia `rarr` Sperms
D. Spermatogonia `rarr` primary spermatocytes `rarr` Secondary spermatocytes `rarr` Spermatids `rarr` Sperms.

Answer

**Step-by-Step Solution for the Question: "Which is the correct sequence in spermatogenesis?"**

1. **Understanding Spermatogenesis**: Spermatogenesis is the process by which sperm cells (spermatozoa) are produced from male primordial germ cells. This process involves both mitosis and meiosis.

2. **Starting Point - Spermatogonia**: The process begins with spermatogonia, which are the initial germ cells located in the seminiferous tubules of the testes. These cells undergo mitosis to increase their number.

3. **Formation of Primary Spermatocyte**: The spermatogonia then differentiate into primary spermatocytes. This transition is also a result of mitotic division.

4. **Meiosis I - Secondary Spermatocytes**: Each primary spermatocyte undergoes meiosis I, resulting in the formation of two secondary spermatocytes. This is the first meiotic division.

5. **Meiosis II - Spermatids**: Each secondary spermatocyte then undergoes meiosis II, which results in the formation of a total of four spermatids from the two secondary spermatocytes.

6. **Spermiogenesis - Formation of Spermatozoa**: Finally, the spermatids undergo a transformation process called spermiogenesis, where they mature into spermatozoa (mature sperm cells).

7. **Correct Sequence**: Therefore, the correct sequence in spermatogenesis is:
- Spermatogonia → Primary Spermatocyte → Secondary Spermatocyte → Spermatids → Spermatozoa

**Final Answer**: The correct sequence in spermatogenesis is:
**Spermatogonia → Primary Spermatocyte → Secondary Spermatocyte → Spermatids → Spermatozoa**

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