Fragile X syndrome is caused by:
A)exposure to high doses of 5-bromouracil.
B)exposure to high doses of free radicals.
C)an inherited microdeletion.
D)spontaneous depurination.
E)trinucleotide expansion.

Question

Quizplus · Accepted Answer

Fragile X syndrome is caused by a trinucleotide expansion, specifically a CGG repeat expansion in the FMR1 gene on the X chromosome. This expansion leads to reduced or absent production of the FMRP protein, which is important for brain development and function.

Fragile X Syndrome Is Caused By