Boys are more likely than girls to develop fragile X syndrome.

Question

Quizplus · Accepted Answer

Fragile X syndrome is caused by a mutation on the X chromosome. As males have only one X chromosome, if they inherit the mutation, they will develop the syndrome. However, females have two X chromosomes and may inherit a normal X chromosome that can compensate for the mutated one, leading to milder symptoms or no symptoms at all. Therefore, boys are more likely than girls to develop fragile X syndrome.

Boys Are More Likely Than Girls to Develop Fragile X