One million oocytes and one million secondary spermatocytes will give:

Options

A. 2 million ova 1 million sperms
B. 2 million ova and 2 million sperms
C. 1 million ova and 2 million sperms
D. 1 million ova and 1 million sperms

Answer

To solve the question of how many ova and sperms can be produced from one million oocytes and one million secondary spermatocytes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Oogenesis**:
- In oogenesis, each primary oocyte undergoes meiosis to produce one secondary oocyte and one polar body during meiosis I.
- The secondary oocyte then undergoes meiosis II to produce one ovum and another polar body.
- Therefore, from one primary oocyte, only one ovum is produced.

2. **Calculating Ova from Oocytes**:
- Given that there are 1 million oocytes, and each oocyte produces one ovum:
\[ \text{Number of Ova} = 1 \text{ million oocytes} \times 1 = 1 \text{ million ova} \]

3. **Understanding Spermatogenesis**:
- In spermatogenesis, each primary spermatocyte undergoes meiosis I to produce two secondary spermatocytes.
- Each secondary spermatocyte then undergoes meiosis II to produce two spermatids, which mature into sperms.
- Therefore, from one secondary spermatocyte, two sperms are produced.

4. **Calculating Sperms from Secondary Spermatocytes**:
- Given that there are 1 million secondary spermatocytes, and each secondary spermatocyte produces two sperms:
\[ \text{Number of Sperms} = 1 \text{ million secondary spermatocytes} \times 2 = 2 \text{ million sperms} \]

5. **Final Result**:
- From the calculations:
- Ova produced: 1 million
- Sperms produced: 2 million
- Therefore, the final answer is:
\[ \text{1 million ova and 2 million sperms} \]

### Conclusion:
The correct answer is **1 million ova and 2 million sperms**.

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