If blood group of mother is AB `&` Father is 'O' the child may be `:-`

Options

A. A,AB,O
B. AB,O
C. B,O
D. A,B

Answer

To determine the possible blood groups of a child when the mother has blood group AB and the father has blood group O, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Genotypes of Parents**:
- The mother with blood group AB has the genotype IAIB (where IA represents the A allele and IB represents the B allele).
- The father with blood group O has the genotype IOIO (where IO represents the O allele).

2. **Set Up the Punnett Square**:
- We will set up a Punnett square to visualize the possible combinations of alleles from the parents.
- The mother's alleles (IA and IB) will be on one side, and the father's alleles (IO) will be on the other side.

3. **Cross the Alleles**:
- The combinations from the cross will be:
- IA from mother with IO from father → IAIO (Blood group A)
- IA from mother with IO from father → IAIO (Blood group A)
- IB from mother with IO from father → IBIO (Blood group B)
- IB from mother with IO from father → IBIO (Blood group B)

4. **Determine the Blood Groups**:
- From the combinations, we can see that the possible genotypes for the child are:
- IAIO (which corresponds to blood group A)
- IBIO (which corresponds to blood group B)
- Therefore, the possible blood groups for the child are A and B.

5. **Conclusion**:
- The child may have either blood group A or blood group B.

### Final Answer:
The child may have blood group A or blood group B.