How many structures are diploid ?
Sperms, spermatid, spermatogonia, primary spermatocyte, secondary spermatocyte

Answer

To determine how many structures are diploid among the given options (sperms, spermatid, spermatogonia, primary spermatocyte, secondary spermatocyte), we can analyze each structure based on their chromosome number:

1. **Spermatogonia**:
- These are the germ cells in the male reproductive system.
- They are diploid, meaning they contain two sets of chromosomes (46 chromosomes or 23 pairs).

2. **Spermatid**:
- This is the haploid product of meiosis, meaning it contains only one set of chromosomes (23 chromosomes).
- Therefore, spermatids are not diploid.

3. **Sperms**:
- Sperm cells are also haploid, containing only one set of chromosomes (23 chromosomes).
- Thus, sperm cells are not diploid.

4. **Primary Spermatocyte**:
- This cell undergoes meiosis to form secondary spermatocytes.
- Primary spermatocytes are diploid, containing two sets of chromosomes (46 chromosomes or 23 pairs).

5. **Secondary Spermatocyte**:
- These are the result of the first meiotic division of primary spermatocytes.
- Secondary spermatocytes are haploid, containing only one set of chromosomes (23 chromosomes).
- Therefore, secondary spermatocytes are not diploid.

Now, summarizing the diploid structures:
- **Diploid Structures**:
- Spermatogonia
- Primary Spermatocyte

Thus, the total number of diploid structures is **2**.

### Final Answer:
**2 structures are diploid: Spermatogonia and Primary Spermatocyte.**