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Genetics of Marfan Syndrome 2

Page history last edited by Bradley Vivace 14 years, 6 months ago



Marfan Syndrome is an autosomal dominate genetic defect.  It affects the Fibrillin-1 gene which is located on the chromosome 15q1.5----q2.1.[1] 




If neither parent is a carrier of the disease, there is no chance of inheriting Marfan syndrome; but not impossible to have.  A mutation of fibrillin-1 will cause marfans syndrome.



If one parent posesses the allele than its 50/50 whether the offspring will portray the phenotype

     this is because its a dominate allele.  It only takes 1 to posess the phenotype. 




If both parents have the phenotype it is a 100 percent chance the offspring will have the phenotype.  



  1. "Marfan syndrome image." Heart.org. Heart Association of America, n.d. Web. 1 Nov. 2009.
  2. Chromosome Map." National Encyclopedia of Health. National Institute of Health, n.d. Web. 1 Nov. 2009. .

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