Fragile X Syndrome

By: Marissa m, Marissa p.

Fragile X Syndrome.

Fragile X Syndrome is an inherited condition by an x chromosome that is abnormally susceptible to damage.


1. Autism spectrum disorder

2. Intellectual disability

3. tendency to avoid eye contact

4.flat feet

Cause of the Disorder

Fragile X Syndrome is caused by a change in a gene called FMR1.

Causes of the disease

1.defect in a single gene called FMR1



what happens to the body

1. hyperactive or implusive behavior

2. delay in walking, crawling or twisting

3. hand clapping or hand biting

Fragile X Syndrome affects the whole body.

how is the disorder treated

There are special education classes and other places that are qualified to help these children learn


no medications availble

How is the disorder diagnosed?

Fragile X Syndrome is the most common inherited form of mental retardation currently known. A doctor with perform a DNA analysis to find out if they have Fragile X Syndrome.

Also a blood sample can determine fragile x syndrome


This will be something that children will have for their rest of there lives. They will have speech and language difficulties, behavior issues, sensory-motor and learning disabilities.

what tests are done?

DNA analysis is the method of choice one Is testing specifically for Fragile X Syndrome and associated trinucleotide repeat expansion in the FMR1 gene.

If the diagnosis of the affected relative was based on previous cytogenetic testing for Fragile X Syndrome, at least one affected realative should have DNA testing.

can it be diagnosed prenatal?

Prenatal test can diagnose fragile x syndrome by testing amniotic fluid and getting sample cells from the placenta. This can be very risky and very dangerous so some mothers don't get tested.

how many and what type of people are likely to have this disorder?

about 1 in 4,000 males and 1 in 8,000 females have fragile X syndrome.

is it more common in a gender group or race?

fragile x syndrome is more in white people

How common is it?

Fragile X Syndrome is most common inherited cause of intellectual disabilities and the most common known as autism.