Which of the following statements about Down’s syndrome is incorrect?

Practice question

Question

Which of the following statements about Down’s syndrome is incorrect?

Options

Choose one · Correct answer highlighted

It is caused by trisomy of chromosome 21. It results in developmental and cognitive impairments. It occurs due to the presence of an extra Y chromosome. Correct It is a type of aneuploidy.

Explanation

Down’s syndrome is caused by an extra copy of chromosome 21, not the Y chromosome.

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