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A person with 47 chromosomes due to an additional Y chromosome suffers from a condition called

1. Down's syndrome
2. Superfemale
3. Turner's syndrome
4. Klinefelter's syndrome

Correct answer: Klinefelter's syndrome

Solution

Klinefelter's syndrome is caused by an extra X or Y chromosome in a male, commonly written as 47,XXY or 47,XYY. Since the question specifies an additional Y chromosome and 47 total chromosomes, the intended answer is Klinefelter's syndrome.

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