The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is

Options

A. spermatogonia `rarr` spermatocyte `rarr` spermatid `rarr` sperms
B. spermatid `rarr` spermatocyte `rarr` spermatogonia `rarr` sperms
C. spermatogonia `rarr` spermatid `rarr` spermatocyte `rarr` sperms
D. spermatocyte `rarr` spematogonia `rarr` spermatid `rarr` sperms.

Explanation

To determine the correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis, we can break down the process of spermatogenesis into distinct steps:

### Step-by-Step Solution:

1. **Spermatogonia**: The process begins with spermatogonia, which are the immature germ cells located in the inner wall of the seminiferous tubules of the testis. These cells are diploid (2n).

2. **Mitosis of Spermatogonia**: Spermatogonia undergo mitotic divisions to increase in number. This process results in more spermatogonia, ensuring a sufficient supply of germ cells.

3. **Primary Spermatocytes**: Some of the spermatogonia differentiate into primary spermatocytes. These cells are still diploid (2n) but are now prepared to undergo meiosis.

4. **First Meiotic Division**: The primary spermatocytes undergo the first meiotic division, resulting in two secondary spermatocytes. At this stage, the cells are haploid (n).

5. **Second Meiotic Division**: Each secondary spermatocyte undergoes the second meiotic division, producing a total of four haploid spermatids.

6. **Spermiogenesis**: The spermatids undergo a transformation process called spermiogenesis, where they develop into mature spermatozoa (sperms).

7. **Mature Spermatozoa**: The final product of spermatogenesis is the mature spermatozoa, which are capable of fertilization.

### Correct Sequence:
The correct sequence of spermatogenetic stages is:
- Spermatogonia → Primary Spermatocytes → Secondary Spermatocytes → Spermatids → Spermatozoa

### Final Answer:
The correct answer is option A: Spermatogonia → Primary Spermatocytes → Secondary Spermatocytes → Spermatids → Spermatozoa.

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