Fragile X syndrome
A) is caused by too many X chromosomes on a gene.
B) is similar to Lesch-Nyhan syndrome.
C) primarily affects males.
D) results in an inability to metabolize certain amino acids.

Question

Quizplus · Accepted Answer

Fragile X syndrome is caused by a mutation in the FMR1 gene on the X chromosome, and primarily affects males. Females can also be affected, but often have milder symptoms. It is not caused by too many X chromosomes or an inability to metabolize certain amino acids, and is not similar to Lesch-Nyhan syndrome.

Fragile X Syndrome