The life of a human being begins as a single celled called ____

Options

A. Chromosomes
B. Gametes
C. Zygote
D. None of them

Answer

**Step-by-Step Solution:**

1. **Understanding the Beginning of Human Life**: The life of a human being starts from a single cell. This is a fundamental concept in biology, particularly in the study of human development.

2. **Identifying the Type of Cell**: In humans, this single cell is formed through a process of sexual reproduction, where male and female gametes (sperm and egg) fuse together.

3. **Fertilization Process**: The fusion of the male and female gametes occurs during fertilization, which is also known as syngamy. This process leads to the formation of a new cell.

4. **Formation of the Zygote**: The result of the fertilization is a single cell called a zygote. This zygote is the first stage of development for a human being.

5. **Conclusion**: Therefore, the life of a human being begins as a single cell called a **zygote**.

**Final Answer**: The life of a human being begins as a single cell called **zygote**.

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