fragile x syndrome, characterized by mental retardation, is caused by which chromosomal change?\ndeletion\ntr…

fragile x syndrome, characterized by mental retardation, is caused by which chromosomal change?\ndeletion\ntranslocation\ninversion\ninsertion

fragile x syndrome, characterized by mental retardation, is caused by which chromosomal change?\ndeletion\ntranslocation\ninversion\ninsertion

Answer

Answer:

None of the above options are correct. Fragile X syndrome is caused by an expansion of a CGG - trinucleotide repeat in the FMR1 gene on the X - chromosome.

Brief Explanations:

Fragile X syndrome is a genetic disorder. It is due to a repeat expansion mutation in the FMR1 gene, not a deletion, translocation, inversion, or insertion of chromosomal segments as presented in the options.