Question

people who have been diagnosed with ______ syndrome typically have distinctive physical characteristics, including notable facial features, heart abnormalities, and a thick tongue.
$\bigcirc$ down
$\bigcirc$ huntington’s
$\bigcirc$ fragile x
$\bigcirc$ marfan

Explanation:

Down syndrome (Trisomy 21) is associated with distinct physical traits like unique facial features, heart issues, and a thick tongue. Huntington’s is a neurodegenerative disorder with different symptoms. Fragile X has distinct cognitive and physical traits but not the same as described here. Marfan syndrome affects connective tissue with features like tall stature and heart valve issues, not the given traits. So the correct option is Down.

Answer:

A. Down