Olaf has been diagnosed with Klinefelter's syndrome. What is his chromosomal pattern? Select one: a. XY b. XXY c. XO d. XYY

The correct answer is b. XXY.Klinefelter's syndrome is a genetic condition that affects males and is characterized by the presence of an extra X chromosome. In individuals with Klinefelter's syndrome, the chromosomal pattern is typically 47,XXY, instead of the usual 46,XY in males. This means that they have two X chromosomes and one Y chromosome, rather than the typical one X and one Y chromosome.The presence of the extra X chromosome can lead to a range of physical, cognitive, and behavioral characteristics associated with Klinefelter's syndrome, such as tall stature, reduced muscle mass, gynecomastia (enlarged breast tissue in males), learning difficulties, and social and emotional challenges. It is important for individuals with Klinefelter's syndrome to receive appropriate medical and psychological support to manage the condition and address any associated challenges.