Fragile X syndrome (FXS) is an X‐linked neurodevelopmental disorder that is caused by the functional loss of the fragile X messenger ribonucleoprotein 1 (Fmr1) gene, resulting in a reduction or absence of RNA‐binding protein fragile X messenger ribonucleoprotein (FMRP) (Hagerman, 2006; Hagerman & Hagerman, 2002). Here, FMR1 is linked to fragile X syndrome.