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30 September, 03:35

A chromosome-transmitted form of intellectual disability caused by the presence of an extra copy of chromosome 21 is called what?

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  1. 30 September, 05:51
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    Answer: Down syndrome

    Explanation:

    Down syndrome, also known as Trisomy 21 is characterized by an extra copy of chromosome on its position 21 seen as XXY.

    This results in cognitive development coupled with intellectual and delayed physical growth
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