Here is a YouTube video that gives more information on Fragile X Syndrome and how this mental retardation can be inherited.

http://www.youtube.com/watch?v=auIwEV1SiBQ

Here is another YouTube video that shows what life is like from a moms perspective on having two sons with Fragile X Syndrome.

http://www.youtube.com/watch?v=QrWu4ncrDyg