Tom is a tall man with undeveloped testes and enlarged breasts.His doctor has determined that he has an extra X chromosome leading to the diagnosis of:
A)Down syndrome.
B)Fragile X syndrome.
C)Klinefelter syndrome.
D)Turner syndrome.

Question

Quizplus · Accepted Answer

Tom's symptoms are characteristic of Klinefelter syndrome, which occurs when a male has an extra X chromosome, leading to underdeveloped testes and breast enlargement. Down syndrome is caused by a trisomy of chromosome 21, Fragile X syndrome is caused by a mutation in the FMR1 gene, and Turner syndrome occurs when a female is missing an X chromosome.

Tom Is a Tall Man with Undeveloped Testes and Enlarged