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Science · 2024 · 2 marks
CBSE 2024 · Region 5 · Set 2 · Q24
Explain how the original number of chromosomes present in the parents are restored in the progeny. Name the cell division by which chromosome number…
Explain how the original number of chromosomes present in the parents are restored in the progeny. Name the cell division by which chromosome number is maintained in the progeny.
Marking-scheme solution
Parents produce germ cells in specialised organs which have only half the number of chromosomes as compared to non-reproductive body cells. When these germ cells from two parents combine during sexual reproduction to obtain a progeny/ zygote, it restores the original number of chromosomes as in the parents.
Meiosis
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CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.