Question

Which one of the following structures is haploid (n) in relation to the male reproductive system?

• A. Secondary spermatocytes
• B. Primary spermatocytes
• C. Leydig cells
• D. Sertoli cells

Hint:

Secondary spermatocytes are haploid (n) and are formed during the first meiotic division in spermatogenesis.

Answer 1

The Correct Option is A

In the male reproductive system, the process of spermatogenesis produces sperm cells. During this process, different cells are formed at various stages.
Step 1: Understanding the options.
- Secondary spermatocytes (Option 1): Secondary spermatocytes are haploid (n) cells formed after the first meiotic division of primary spermatocytes. They have half the chromosome number.
- Primary spermatocytes (Option 2): Primary spermatocytes are diploid (2n) cells that undergo meiosis to produce secondary spermatocytes.
- Leydig cells (Option 3): Leydig cells are diploid cells that produce testosterone in the testes, not involved in the process of meiosis.
- Sertoli cells (Option 4): Sertoli cells are also diploid cells that support and nourish developing sperm cells in the seminiferous tubules.
Step 2: Conclusion.
The secondary spermatocytes are haploid (n) as they have undergone the first meiotic division.
Final Answer: \[ \boxed{\text{The correct answer is (1) Secondary spermatocytes.}} \]