Question

Which genotype and phenotype is a result of aneuploidy in sex chromosomes?

• A. $22$ pairs $+$ XXY male
• B. $22$ $+$ XX female
• C. $22$ pairs $+$ XXXY female
• D. $22$ pairs $+$ Y female

Answer 1

The correct option is A $22$ pairs $+$ XXY male

Males have an X and a Y (XY). But in rare cases, a male is born with an extra X chromosome (XXY). This is Klinefelter syndrome. It's also called Klinefelter's or XXY.

So, the correct answer is '22 pairs + XXY male'.