Question

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Answer 1

Answer:

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Explanation:

(a) down's syndrome.

(b) Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21. This extra genetic material causes the developmental changes and physical features of Down syndrome.

(c) In 1866 British physician, John Langdon Down, for whom the syndrome is now named, first described Down syndrome, as “Mongolism.” The term Down syndrome didn't become the accepted term until the early 1970s.

Answer 2

Answer:

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