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    HDEV Study Set 1
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    Exam 2: Heredity and Prenatal Development
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    Down's Syndrome Is Caused
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Down's Syndrome Is Caused

Question 2

Question 2

Multiple Choice

Down's syndrome is caused:


A) due to alcohol abuse by the mother at the time of conception.
B) by sex-linked chromosomal abnormalities.
C) by an extra chromosome on the 21st pair.
D) due to drug abuse by the mother during pregnancy.

Correct Answer:

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