Twenty-year-old Jack is extremely tall and has very thick facial hair. Most of his male secondary sex characteristics are also more pronounced than men of his age. In this scenario, Jack is most likely:
A) an XYY male.
B) to be diagnosed with Klinefelter syndrome.
C) an XXY male.
D) to be diagnosed with Down's syndrome.

Question

Quizplus · Accepted Answer

Jack's symptoms suggest he is an XYY male, a condition associated with an extra Y chromosome, which can lead to taller stature and more pronounced male secondary sex characteristics.

Twenty-Year-Old Jack Is Extremely Tall and Has Very Thick Facial