Hello! At my sister in February, 2004 from syndrome Marfana has died reb...

[Anna]

Hello!
At my sister in February, 2004 from syndrome Marfana the child (5, 5 years) has died. The first child is absolutely healthy.
The question interests: what probability of occurrence of the following child healthy? Whether it is possible or probable? What is necessary that the subsequent child was born healthy?
I hope for the fast and competent information.
Anna.

[Anna]

Hello! At my sister in February, 2004 from syndrome Marfana the child (5, 5 years) has died. The first child is absolutely healthy. The question interests: what probability of occurrence of the following child healthy? Whether it is possible or probable? What is necessary that the subsequent child was born healthy? I Hope for the fast and competent information. Anna.