Question: you are working as a genetic counselor a recently married...
You are working as a genetic counselor.
A recently married couple are referred to your office. Both of them are heterozygous for an autosomal recessive disease called Gaucher's disease.
What is the probability that their first child will either be a girl or have Gaucher's disease?
(Note that this is not asking for the probability that the child is a girl with Gaucher's disease.)