Journal of Child and Adolescent Behavior - Genotype-Phenotype Correlates in Fragile X Syndrome
A mutation in one of the two copies of the X chromosome in females and in the only copy of it in males is sufficient to result ... 1991) Identification of a gene (FMR-1) containing a CGG repeat coincident with a breakpoint cluster region exhibiting lenghth ... Fra (X) genotype: Fragile X is an X linked disorder in which there is a marker on the X chromosome which represents a fragile ... Fragile X cases have more than 200 repeats of the trinucleotide CGG at a fragile locus of the X chromosome (Xq27.3) which ...