Multiple Choice
Regarding Down syndrome,which of the following statements is TRUE?
A) Down syndrome is a sex-linked hereditary condition.
B) Down syndrome results from a lack of an important enzyme and is linked to very low levels of dopamine.
C) Down syndrome is a condition caused by an extra chromosome at pair 21.
D) Down syndrome results from an insufficient supply of thyroid hormone.
Correct Answer:

Verified
Correct Answer:
Verified
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