Human gametes differ from all other body cells in being

Options

A. Haploid
B. Diploid
C. Motile
D. Without cell wall.

Answer

**Step-by-Step Solution:**

1. **Understanding the Types of Cells**:
- Human cells can be classified into two main types: somatic cells (body cells) and gametes (reproductive cells).
- Somatic cells include all body cells except for the gametes and contain a full set of chromosomes.

2. **Chromosome Count**:
- Somatic cells in humans have a diploid number of chromosomes, which is 46 (23 pairs).
- Gametes, on the other hand, have a haploid number of chromosomes, which is 23 (one from each pair).

3. **Definition of Gametes**:
- Gametes are specialized cells involved in reproduction. In humans, these are the sperm (male gamete) and the egg (female gamete).
- The process of fertilization occurs when a sperm and an egg fuse, resulting in a diploid zygote with a complete set of chromosomes (46).

4. **Analyzing the Options**:
- A) Haploid: This is true for gametes, as they contain half the number of chromosomes compared to somatic cells.
- B) Diploid: This is incorrect, as gametes are not diploid.
- C) Motile: While sperm are motile, eggs are not, making this option not universally applicable to both gametes.
- D) Without cell wall: This is true for human cells in general, but it does not specifically differentiate gametes from somatic cells.

5. **Conclusion**:
- The primary distinction between human gametes and all other body cells is that gametes are haploid. Therefore, the correct answer is option A: haploid.

**Final Answer**: A) Haploid

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