To be exact in what Marfan Syndrome is a genetic disease that usually is caused because one or both of the parents had Marfan Syndrome as well. The trait for Marfan Syndrome is dominate, so even if only one parent has the disorder, there's a chance that the child also will have the disorder. A Marfan Syndrome karyotype would look no different than a karyotype from a normal person. That is because Marfan's is caused by as little as one mutation to one gene (fibrillin-1), and this mutation would not be visible in a karyotype.
The pedigree above shows a generic family tree of a potential family that has the disorder. This disorder doesn't favor any particular race, gender, or climate. Marfan Syndrome slowly weakens the connective tissue in your body. This connective tissue in your body provides shape for many places on your body; this is why people with this disorder usually have longer arms, legs and fingers. Connective tissue develops and grows the body's cells as well as being an adhesive for certain tissues. The people with the disorder also have abnormal chests. Their chests are concave, they dip in near the middle of their chests. There are many symptoms of Marfan Syndrome but just having the symptoms doesn't necessarily mean you have the disorder. Some of the symptoms are: Scoliosis, flat feet, cysts, narrow faces, crowded teeth and many more. The main organs this disorder affects are the spinal chord, the heart, the lungs, the eyes and the skin.