Which of these is the first cell formed during the development of a human baby?

Options

A. Embryo
B. Zygote
C. Sperm
D. Ovum

Answer

**Step-by-Step Text Solution:**

1. **Understanding Gametes**: In human reproduction, the male parent produces sperm, and the female parent releases an ovum (egg). Both of these are known as gametes, and they contain genetic material.

2. **Fertilization Process**: When a sperm successfully fertilizes an ovum, a new cell is formed. This process is known as fertilization.

3. **Formation of the First Cell**: The cell that is formed as a result of the fertilization of the sperm and ovum is called a zygote. This zygote contains a diploid number of chromosomes (2n), which means it has genetic material from both parents.

4. **Development Stages**: After the zygote is formed, it undergoes several rounds of cell division, leading to the formation of an embryo. The embryo is the term used for the developing organism after the zygote has divided multiple times.

5. **Conclusion**: Therefore, the first cell formed during the development of a human baby is the zygote.

**Final Answer**: The first cell formed during the development of a human baby is the **zygote**.

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