Which feature is common among people who have Klinefelter syndrome (47,XXY) or a karyotype with 47,XXX but not among people who have Down syndrome or Edward syndrome?
A)Severely reduced cognition
B)Cleft palate
C)Tall stature
D)Infertility

Question

Which feature is common among people who have Klinefelter syndrome (47,XXY) or a karyotype with 47,XXX but not among people who have Down syndrome or Edward syndrome?
A)Severely reduced cognition
B)Cleft palate
C)Tall stature
D)Infertility

Quizplus · Accepted Answer

In childhood, the only phenotypic manifestation of Klinefelter syndrome is that the boy usually has long legs and is taller than siblings at the same ages. Often, his final height is taller than that of either parent. The most outstanding and consistent feature is that 47,XXX women are taller than average and are taller than most family members. Although 47,XXY males are infertile, women with 47,XXX are not. Neither is associated with severely reduced cognition or cleft palate. Both Down syndrome and Edward syndrome result in shorter-than-average stature.

Which Feature Is Common Among People Who Have Klinefelter Syndrome