Hi Amanda,

Sorry, I can't really see your question, but think I knew what you might be asking.

Multiple sclerosis is thought to be triggered by a combination of risk factors, one of which may be found in genetics.  Here is an excerpt from paper entitled The Basics of Genetics of Multiple Sclerosis.

"The risk of developing MS in people who have no relatives with MS is about 1 in
1,000. Eighty percent (80%) of people who develop MS have no relatives with MS, and
20% have at least one affected relative with the disease. The risk of MS in the siblings of a person with MS is significantly higher. A measure of the size of the genetic component of disease susceptibility is the sibling risk, which is defined as the ratio of the disease risk in a sibling of an affected individual to the general population. The sibling risk for MS may range from 1 in 20 to 1 in 50. As one moves from siblings to first and third cousins, the risk decreases. However, the first, second, and third-degree relatives of people with MS are more likely to have the disease than the general population (Dyment, Ebers, & Sadovnick, 2004).

The half-sibling and full sibling studies showed a 2.35% for MS in siblings with a shared
mother who had MS, and 1.31% for a shared father who had MS, indicating a maternal
effect. The risk of transferring MS from mother to siblings was higher (Dyment, Ebers, & Sadovnick, 2004; Ebers, 1996)."

There is some exciting research which is looking into the genetic factors and DNA markers which are determined to be involved in MS.  Here is a summary of research which the NMSS has put together.

If this doesn't lead to the answer of your question, please feel free to ask again.  Or, actually, please feel free to let us know if there is anything else we can help you with.