Examlex
Down syndrome is an example of nondisjunction of chromosomes.
Facial Expressions
Visible changes in the facial muscles that convey emotions, intentions, or social information.
Communication
The act of transferring information from one place, person, or group to another, whether verbally, non-verbally, or through written media.
Smile
A facial expression formed primarily by flexing the muscles at the edges of the mouth, often indicating joy, amusement, or satisfaction.
Frown
is a facial expression characterized by furrowing one’s brows, often indicating displeasure, sadness, or concentration.
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