Which of the following about Fragile X is true? (I) occurs at the rate of 1 per 3600 females; (II) associated with some aspects of impaired neurological development; (III) associated with difficulties in intellectual and social functioning; (IV) has a genetic basis in the form of abnormality in the Y chromosome

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Fragile X syndrome is indeed associated with impaired neurological development (II) and difficulties in intellectual and social functioning (III). It is caused by a genetic mutation on the FMR1 gene on the X chromosome, not the Y chromosome, making option IV incorrect. The incidence rate in females is also not accurately represented in option I.

Which of the Following About Fragile X Is True? (I)