A woman whose hemoglobin S levels are less than 1% has a brother with sickle cell disease and both parents have been diagnosed as carriers for the disorder. She asks what her risks are of having a child with sickle cell disease. What is the best response?
A."Because you do not have the trait, you cannot have a child with sickle cell disease regardless of your partner's sickle cell status."
B."Because both your parents have the trait, it is possible for you to have a child with sickle cell disease if your partner actually has the disease."
C."Because your brother actually has sickle cell disease, the risk for your children having sickle cell disease is 50% with each pregnancy."
D."Because you are a woman, your daughters will each have a 50% risk for having the disease and all of your sons will be carriers of the trait."