Marco has a round face;a broad,flat nose;small,downward sloping folds of skin at the inside corners of his eyes;a protruding tongue;small,squarish hands;and unusually short arms and legs in relation to his body.He suffers from intellectual disability and from heart and respiratory problems.He most likely has ________.

Question

Quizplus · Accepted Answer

The physical characteristics described in the scenario are commonly associated with Down syndrome. Down syndrome is caused by the presence of an extra copy (or partial copy) of chromosome 21, and individuals with Down syndrome may experience a range of physical and developmental challenges, including intellectual disability and cardiac and respiratory issues. Klinefelter's syndrome and fragile X syndrome also involve intellectual disability, but they would not typically be associated with the specific physical characteristics described in the scenario. Phenylketonuria (PKU) is a metabolic disorder that can cause intellectual disability if untreated, but it does not typically cause the physical characteristics described in the scenario.

Marco Has a Round Face;a Broad,flat Nose;small,downward Sloping Folds of Skin