See Also: syndrome, fragile x(medicine)
Fragile X Syndrome(health)
Fragile x syndrome(medicine)
fragile(dictionary)
fragile(dictionary)
Fragile X chromosome(health)
Fragile site(health)
fragile X chromosome(medicine)
fragile site(medicine)
chromosome fragile sites(medicine)

Fragile X Syndrome (health)


Fragile X Syndrome is the most common inherited cause of mental impairment, and the most common known cause of autism. Fragile X syndrome is a genetic disorder caused by a mutation of the FMR1 gene on the X chromosome, a mutation found in 1 out of every 2000 males and 1 out of every 4000 females. Typically the FMR1 gene contains between 6 and 53 repeats of the CGG codon. In people with the disorder, the FMR1 allele has over 230 repeats.