Susan, a mother with type B blood, has a child with type O blood.She claims that Craig, who has type A blood, is the father.He claims that he cannot possibly be the father.Further blood tests ordered by the judge reveal that Craig is AA.The judge rules that
A)Susan is right, and Craig must pay child support.
B)Craig is right and doesn't have to pay child support.
C)Susan cannot be the real mother of the child; there must have been an error made at the hospital.
D)it is impossible to reach a decision based on the limited data available.
E)none of these is true.

Question

Quizplus · Accepted Answer

Since Craig is AA, he can only pass on the A allele to his child. However, the child has type O blood, which only occurs when both parents contribute an O allele. Therefore, Craig cannot be the biological father and is not required to pay child support.

Susan, a Mother with Type B Blood, Has a Child