Individuals with Down syndrome show which of the following characteristics?
A) mental retardation
B) aggression
C) an extra X chromosome
D) a lack of sexual development
Correct Answer:
Verified
Q25: Inherited disorders
A) are more often caused by
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Q44: Children with Down syndrome typically have
A) advanced
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Q55: The extra 21st chromosome that causes Down
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Q59: _ is one of the few serious
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