Answer: A person can get this genetic disorder from his or her parents. There is a 50% chance of passing it down to your children if you have the genetic disorder. Sometimes you may be the first person in your family to get the disease. If that happens it is because a mutation has occured in your gene that tells your body how to make fibrillin-1, a protien that is an important part of connective tissue. Marfan Syndrome is autosomal dominant. It means that it is a dominant trait. The disease is genetic because it happens when a mutation occurs in the genes of a person.
http://www.marfan.org/marfan/2416/Cause
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