Question:
Down's syndrome occurs due to abnormality of which pair of chromosomes?
Down's syndrome occurs due to abnormality of which pair of chromosomes?
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Down's syndrome = Trisomy of chromosome 21 (three copies instead of two).
Updated On: Mar 7, 2025
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Solution and Explanation
Down's syndrome is caused by trisomy of the 21st chromosome, meaning an individual has three copies of chromosome 21 instead of the normal two. This results in developmental delays and characteristic physical features.
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