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

Options

A. Spermatid-spermatocyte-spermotogonia-sperms
B. Spermatogonia-spermatid-spermatocyte-sperms
C. spermatocyte-spermatogonia-spermatid-sperms
D. Spermatogonia-spermatocyte-spermatid-sperms

Answer

To solve the question regarding the correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis, we can break down the process into the following steps:

### Step-by-Step Solution:

1. **Spermatogonia**: The process begins with spermatogonia, which are the diploid germ cells located in the seminiferous tubules of the testes. These cells can undergo mitotic division to produce more spermatogonia or can differentiate into primary spermatocytes.

2. **Primary Spermatocyte**: The spermatogonia undergo mitosis to form primary spermatocytes. These are still diploid cells (2n) and are the first stage in the formation of sperm.

3. **Secondary Spermatocytes**: Each primary spermatocyte undergoes the first meiotic division (meiosis I), resulting in two haploid secondary spermatocytes (n). This is the first reduction division where the chromosome number is halved.

4. **Spermatids**: Each secondary spermatocyte then undergoes the second meiotic division (meiosis II), producing a total of four haploid spermatids (n). These cells are not yet mature sperm cells.

5. **Spermatozoa**: Finally, the spermatids undergo a process of differentiation and maturation to become sperm cells, also known as spermatozoa. This maturation process includes the development of a tail and the condensation of the nucleus.

### Correct Sequence:
Thus, the correct sequence of spermatogenetic stages is:
1. Spermatogonia
2. Primary Spermatocyte
3. Secondary Spermatocyte
4. Spermatids
5. Spermatozoa

### Answer:
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is:
**Spermatogonia → Primary Spermatocyte → Secondary Spermatocyte → Spermatids → Spermatozoa.**

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