"fragile X syndrome." YourDictionary, n.d. Web. 12 October 2018. <http://www.yourdictionary.com/fragile-x-syndrome>.
fragile X syndrome. (n.d.). Retrieved October 12th, 2018, from http://www.yourdictionary.com/fragile-x-syndrome
fragile X syndrome
An inherited disorder caused by a defective gene on the X chromosome and marked by intellectual disability, developmental disorders, enlarged testes, and facial abnormalities in males and by mild or no effects in heterozygous females.