What is the correct relation between the chromosome number in a human body cell and that in a reproductive cell?
Answer and explanation
Correct answer: A body cell has 46 and a reproductive cell has 23
Human somatic, or body, cells are diploid and normally contain 46 chromosomes arranged in 23 pairs. Human reproductive cells, or gametes, are haploid and contain 23 chromosomes, one from each pair. This reduced number allows sperm and egg to fuse and restore 46 chromosomes in the zygote. Therefore option B is correct; options A, C and D contradict the normal human chromosome counts.
Frequently asked questions
What is the correct answer to this question?
A body cell has 46 and a reproductive cell has 23
Why is this the correct answer?
Human somatic, or body, cells are diploid and normally contain 46 chromosomes arranged in 23 pairs. Human reproductive cells, or gametes, are haploid and contain 23 chromosomes, one from each pair. This reduced number allows sperm and egg to fuse and restore 46 chromosomes in the zygote. Therefore option B is correct; options A, C and D contradict the normal human chromosome counts.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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