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?

Question

Quizplus · Accepted Answer

The fetus has Klinefelter syndrome, which is a condition where a male is born with an extra X chromosome (XXY). This is caused by a nondisjunction event during meiosis, most likely in the father's sperm. Down syndrome is caused by an extra copy of chromosome 21, and Turner syndrome is caused by a missing X chromosome. The fetus having an autosomal disorder is also incorrect, as it has an extra sex chromosome, not an extra chromosome from an autosome pair.

A Karyotype Reveals That a Woman Is Carrying a Fetus