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The Best Known Chromosomal Abnormality Associated with Mental Retardation Is

Question 16

Multiple Choice

The best known chromosomal abnormality associated with mental retardation is __________; the most common type of this abnormality is __________.


A) Fragile X syndrome; trisomy 21
B) Tay-Sachs disease; trisomy 21
C) Down syndrome; trisomy 23
D) Tay-Sachs disease; trisomy 23
E) Down syndrome; trisomy 21

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