Multiple Choice
Down syndrome is also known as trisomy-21 because individuals with Down syndrome __________.
A) have three distinct facial features by the 21st week of pregnancy
B) show three distinct temperament patterns by the 21st week of infancy
C) have an extra chromosome on the 21st pair
D) have 21 genes on the 3rd pair of chromosomes
Correct Answer:
Verified
Correct Answer:
Verified
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