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ADEX Dental Hygiene Exam Prep

Category - DANB

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What is trisomy 21?

FAS
Down Syndrome
Autism
ADHD

Explanation

Answer: B - Trisomy 21 is Down syndrome. It is defined as a mental retardation disorder and is the most common chromosomal abnormality affecting 1 in 700 births, but varies with maternal age. Individuals with Down syndrome display a variety of abnormal features. A short list includes small brachycephalic skull, front flat facies, small nasomaxillary complex, ocular hypotelorism, and simian crease.

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