Timothy's wife is having trouble conceiving a child despite reports on her reproductive fitness being normal. However, on examining Timothy, the doctor determines that his testes are undeveloped, and that he has enlarged breasts. He also observes that Timothy is unusually tall, although his parents and grandparents are of short stature. The doctor informs Timothy that these symptoms are due to Timothy having an extra X chromosome, making him XXY instead of XY. Timothy most likely suffers from
A) Down syndrome.
B) Fragile X syndrome.
C) Klinefelter syndrome.
D) Turner syndrome.

Question

Quizplus · Accepted Answer

Klinefelter syndrome is a genetic disorder that occurs when a male is born with an extra X chromosome. This results in undeveloped testes, enlargement of breast tissue, and other physical characteristics such as being tall. This condition can cause infertility and difficulties with sexual development. None of the other options (A) Down syndrome, (B) Fragile X syndrome, and (D) Turner syndrome are associated with an extra X chromosome in males.

Timothy's Wife Is Having Trouble Conceiving a Child Despite Reports