تعريف fragile x syndrome في الإنجليزية الإنجليزية القاموس.
A particular, genetic syndrome, caused by the excessive repetition of a particular trinucleotide
An inherited disorder caused by a defective gene on the X-chromosome and causing mental retardation, enlarged testes, and facial abnormalities in males and mild or no effects in heterozygous females. It is the most common inherited cause of mental retardation