A Boy with Recessive X- Linked Hemophilia Is Born from an Unaffected

Multiple Choice

A boy with recessive X- linked hemophilia is born from an unaffected mother and a father with hemophilia. From which parent was the disease allele inherited?

A) the father or the mother with an equal chance of either parent
B) the mother
C) the father
D) any of these answers is equally likely
E) both parents, the trait is recessive