How many chromosomes are usually present in a human reproductive cell?
Answer and explanation
Correct answer: Twenty-three
Human reproductive cells, or gametes, are haploid, so they contain one chromosome set rather than the two sets found in body cells. Meiosis reduces the chromosome number from 46 to 23. During fertilization, the sperm and egg each contribute 23 chromosomes, restoring the diploid number of 46 in the zygote. Therefore option A is correct; 46 describes a typical body cell, not a gamete.
Frequently asked questions
What is the correct answer to this question?
Twenty-three
Why is this the correct answer?
Human reproductive cells, or gametes, are haploid, so they contain one chromosome set rather than the two sets found in body cells. Meiosis reduces the chromosome number from 46 to 23. During fertilization, the sperm and egg each contribute 23 chromosomes, restoring the diploid number of 46 in the zygote. Therefore option A is correct; 46 describes a typical body cell, not a gamete.
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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