Although two cells, called gametes, fuse, the product formed is a single cell called zygote. Justify.

Explanation

### Step-by-Step Solution:

1. **Understanding Gametes**: Gametes are specialized reproductive cells. In humans, the male gamete is called sperm, produced in the testes, and the female gamete is called ovum (or egg), produced in the ovaries.

2. **Fertilization Process**: The fusion of the male and female gametes occurs during a process called fertilization. This typically takes place in the fallopian tube of the female reproductive system.

3. **Formation of Zygote**: When the sperm (male gamete) successfully penetrates and fuses with the ovum (female gamete), their nuclei also fuse together. This fusion results in the formation of a single nucleus.

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