A friend of yours has just had a baby. When she leaves the hospital, she receives a lab report that provides that the baby has type O blood. She is concerned that the hospital may have made a mistake and given her the wrong baby. She does not see how she could have a baby with type O blood when both she and her husband have type B blood.
29.
She knows you are taking a human genetics course at FGCU and asks if you can explain to her if it is possible for her child to have type O blood. Which explanation do you give?
A) Because you and your husband are both type B, it is impossible for your child to have type O blood. Take the baby back to the hospital and get your "real" baby.
B) There must be a mistake in the typing of either the mother or father of the child. Both should be re-typed.
C) Because both parents are type B, they may carry an i allele; that is, they may be heterozygous and have an IB i genotype; and therefore 25% (1/4) of their offspring have the probability of being type O.
D) The explanation is that the husband is not the baby's biological father.