20th August 2020

A 28-year old man undergoes genetic testing because he has a brother with Fragile X syndrome

A 28-year old man undergoes genetic testing because he has a brother with Fragile X syndrome, and he wants to know the chances of passing on the gene that causes it. This patient is asymptomatic and is of normal intellect. It is found that he has 121 repeats of the mutation (the pre-mutation) that causes Fragile X syndrome. How should he be counselled?

Select the SINGLE most appropriate option from the list below. Select ONE option only.