What is the primary characteristic of Facile X Syndrome?

The primary characteristic of Fragile X Syndrome is indeed a genetic condition that leads to intellectual disability. This syndrome is caused by a mutation in the FMR1 gene on the X chromosome, which results in the absence of the fragile protein necessary for normal brain development. As a consequence, individuals with Fragile X Syndrome often exhibit a range of developmental challenges, the most prominent being cognitive impairment.

In addition to intellectual disabilities, individuals may also experience a variety of behavioral issues, such as social anxiety, hyperactivity, and learning difficulties. However, the fundamental aspect of this condition is its genetic basis, which distinguishes it from other options that do not inherently involve a genetic cause, such as reading comprehension disabilities, physical coordination issues, or mood disorders. Each of these involves different etiologies and manifestations that do not center on the genetic factor intrinsic to Fragile X Syndrome.