Which of the following is the most common inherited cause of learning difficulties?

Question

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Fragile X syndrome is the most common inherited cause of learning difficulties, affecting 1 in 4,000 males and 1 in 8,000 females. It is caused by a mutation in the FMR1 gene on the X chromosome and can lead to intellectual disability, behavioral and emotional problems, and physical characteristics such as a long face and large ears. Down syndrome, Turner syndrome, Klinefelter syndrome, and Williams syndrome are all genetic conditions that can cause learning difficulties, but they are not as common as Fragile X syndrome.

Which of the Following Is the Most Common Inherited Cause