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utrail utrail
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6 years ago
________ is an inherited disorder caused by an extra 21st chromosome which results in mental retardation.
A) Phenylketonuria
B) Huntington's disease
C) Down syndrome
D) Turner's syndrome
Textbook 
Children: A Chronological Approach, Canadian Edition

Children: A Chronological Approach, Canadian Edition


Edition: 5th
Authors:
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wrote...
6 years ago
C) Down syndrome
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