Based on this information, what is Vivian's phenotype for the Marfan syndrome trait?

 - mm
 - not having Marfan syndrome
An organism's phenotype for a trait is its observable version of that trait. Vivian's observable version of the Marfan syndrome trait is not having Marfan syndrome. So, Vivian's phenotype for the Marfan syndrome trait is not having Marfan syndrome.