3. Kevin has Rh-positive blood. His wife, Christine, has Rh-negative blood. Their first child, Andrew, has Rh-positive. Both of Kevin’s parents have Rh-positive blood. What is the probability that the child Kevin and Christine are expecting will be Rh-negative?

Question

3.	Kevin has Rh-positive blood.  His wife, Christine, has Rh-negative blood.  Their first child, Andrew, has Rh-positive.  Both of Kevin’s parents have Rh-positive blood.  What is the probability that the child Kevin and Christine are expecting will be Rh-negative?

Can someone please explain this to me?? I don't know if Kevin has Rh positive blood with a genotype of DD or Dd. PLEASE HELP!!

R_scott · Accepted Answer

unfortunately, there is not enough information to ascertain Kevin's genotype the probability is at most 50% , and may be 0% .50 ≥ p ≥ 0