Female gametes are called ova or egg cells, and male gametes are called ________.

Options

A. Sperm
B. Testes
C. Scrotum
D. Vas deferens

Explanation

**Step-by-Step Solution:**

1. **Understanding Gametes**: Gametes are reproductive cells that are involved in sexual reproduction. In humans, there are two types of gametes: female and male.

2. **Identifying Female Gametes**: The question states that female gametes are called ova or egg cells. This is correct.

3. **Identifying Male Gametes**: To answer the question, we need to identify the male gametes. In humans, the male gametes are known as sperm.

4. **Conclusion**: Therefore, the answer to the question is that male gametes are called sperm.

**Final Answer**: Male gametes are called sperm.

---