An Individual with Swyer Syndrome (46, XY) Differs from an Individual

question 46

Multiple Choice

An individual with Swyer syndrome (46, XY) differs from an individual with Klinefelter syndrome (47, XXY) because

• A) an individual with Swyer syndrome has a Barr body, while an individual with Klinefelter syndrome does not.
• B) an individual with Klinefelter syndrome has a functional SRY gene on his Y chromosome, whereas an individual with Swyer syndrome does not.
• C) both individuals have a functional SRY gene, but the extra X chromosome makes the individual with Klinefelter syndrome appear female.
• D) neither individual has a functional SRY gene, but the X chromosome of the individual with Swyer syndrome has a functional SRY and appears male.
• E) an individual with Swyer syndrome lacks a functional SRY gene, but appears male because it has moved to the X chromosome as in an individual with Klinefelter syndrome.

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