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Question
Klinefelter's syndrome resultsa. from males passing on an extra copy of chromosome #21.
b. from females passing on an extra copy of chromosome #21.
c. from females passing on an extra copy of the Y chromosome (resulting in a 47-chromosome, XXY karyotype).
d. from males passing on an extra copy of the X chromosome (resulting in a 47-chromosome, XXY karyotype).
Answer
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