Question

Two parents think their baby was switched at the hospital. Its 1968, so DNA fingerprinting technology does not exist yet. The mother has

blood type "o," the father has blood type "A," and the baby has blood type "0."
No chance at all that the baby is theirs.
The baby could be theirs it mom's blood genotype is BU
The baby could be theirs it mom's blood genotype is heterozygous O.
The baby could be theirs il dad's blood genotype is heterozygous A.

Answer 1

No chance the baby is theirs.

Step-by-step explanation:

using a Punnett square, you could only get blood type A from the parents.