Which syndrome involves an extra Y chromosome in males and is associated with tall stature and language delays?

Prepare for the American Board of Professional Psychology (ABPP) Exam with flashcards and multiple-choice questions. Each question includes insights and explanations to help you excel. Get ready for your certification journey!

Multiple Choice

Which syndrome involves an extra Y chromosome in males and is associated with tall stature and language delays?

An extra Y chromosome in males creates XYY syndrome, a sex chromosome aneuploidy. In this condition the karyotype is 47,XYY. The additional Y is associated with taller-than-average stature and can include language or speech delays and learning difficulties in some individuals. This matches the stem’s clues about tall stature and language delays. By contrast, Turner syndrome involves a missing X in females (short stature and other features), Klinefelter syndrome involves an extra X in males (XXY) with tall stature and hypogonadal features but not the defining language-delay emphasis, and Lesch-Nyhan is a metabolic disorder with self-injurious behavior and neurologic symptoms rather than a sex chromosome abnormality.

An extra Y chromosome in males creates XYY syndrome, a sex chromosome aneuploidy. In this condition the karyotype is 47,XYY. The additional Y is associated with taller-than-average stature and can include language or speech delays and learning difficulties in some individuals. This matches the stem’s clues about tall stature and language delays. By contrast, Turner syndrome involves a missing X in females (short stature and other features), Klinefelter syndrome involves an extra X in males (XXY) with tall stature and hypogonadal features but not the defining language-delay emphasis, and Lesch-Nyhan is a metabolic disorder with self-injurious behavior and neurologic symptoms rather than a sex chromosome abnormality.

More practice questions