Which of the following statements about fragile X syndrome is not correct?
a. It results in learning and attention disabilities in males.
b. It results in hyperactivity in males.
c. The location of the fragile X site is exactly the same in all of an individual's cells.
d. It results in the formation of shorter-than-normal sequences of CGG.
e. Females are usually heterozygous and are therefore more likely to have a normal
phenotype.
D
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