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10th Class Science Solved Paper - Science-2015 Outside Delhi Set-I

  • question_answer
    What are chromosomes? Explain how in sexually reproducing organisms the number of chromosomes in the progeny is maintained.

    Answer:

    Chromosomes are thread like structures made up of DNA found in the nucleus.
                The original number of chromosomes becomes half during gamete formation.
                Hence, when the gametes combine, the original umber of chromosomes gets restored in the progeny.


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