A karyotype reveals that a woman is carrying a fetus that has 47 chromosomes. The test reveals that the genotype of the fetus is XXY. Which of the following statements is correct?
A) This is a trisomy.
B) This is Turner syndrome.
C) The fetus has Klinefelter syndrome, and most likely a nondisjunction event occurred in the mother during egg formation.
D) This is an autosomal trisomy.

Question

Quizplus · Accepted Answer

The fetus with an XXY genotype has Klinefelter syndrome, which is characterized by the presence of an extra X chromosome in males. This condition often results from nondisjunction during meiosis in one of the parents, leading to an egg or sperm with an extra X chromosome.

A Karyotype Reveals That a Woman Is Carrying a Fetus