Somatic cells of humans have how many pairs of chromosomes in total?
Correct answer: B. 23
- A. 10
- B. 23
- C. 24
- D. 48
Explanation
Somatic cells in humans are diploid, meaning they contain two sets of chromosomes, one from each parent, resulting in 23 pairs, totaling 46 chromosomes. Germ cells, such as sperm and egg cells, are haploid and contain 23 single chromosomes, one from each pair. Therefore, the correct answer is 23 pairs. Option A (10) is incorrect because it underestimates the number of pairs. Option C (24) is incorrect because it overestimates the number of pairs. Option D (48) is incorrect because it mistakenly represents the total number of chromosomes, not pairs.
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Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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