Number of chromosomes in human somatic cells.

**The reasoning** Human somatic cells (body cells like skin, muscle, liver cells — basically any cell except sperm and egg) contain the **diploid number** of chromosomes. "Diploid" means two complete sets: one inherited from your mother, one from your father. In humans, each parent contributes **23 chromosomes** through their gametes (sex cells). When sperm meets egg during fertilization: 23 + 23 = **46 chromosomes total**. These 46 exist as 23 pairs in every somatic cell throughout your body. **Why the wrong options tempt you** - **A) 23** — This is the haploid number found only in gametes (sperm and egg cells). Students mix up somatic cells with sex cells. - **B) 44** — These are just the autosomes (non-sex chromosomes). You're forgetting the 2 sex chromosomes (XX or XY). 44 + 2 = 46. - **D) 48** — This might come from confusing humans with other species, like chimpanzees, which have 48 chromosomes. **Quick takeaway** Remember: **Somatic = 46 (diploid, two sets); Gametes = 23 (haploid, one set)**. Your body cells always have the full double set from both parents.