Which statement best describes Fragile X syndrome?
a. Chromosomal defect affecting only females
b. Chromosomal defect that follows the pattern of X-linked recessive disorders
c. Second most common genetic cause of cognitive impairment
d. Most common cause of noninherited cognitive impairment
C
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A Fragile X primarily affects males.
B Fragile X follows the pattern of X-linked dominant with reduced manifestation
of the syndrome in female and moderate to severe dysfunction in males.
C Fragile X syndrome is the most common inherited cause of cognitive impairment
and the second most common cause of cognitive impairment after Down
syndrome.
D Fragile X is inherited.
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