Blood group of a couple are AB and O. The possible blood group of children would be

Options

A. O group only
B. AB blood group
C. A or B
D. AB and O.

Answer

To determine the possible blood groups of children from a couple with blood groups AB and O, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Alleles**:
- The ABO blood group system is controlled by three alleles: IA (A), IB (B), and i (O).
- The blood group AB has the genotype IAIB, while the blood group O has the genotype ii.

2. **Determine the Gametes**:
- The AB parent (genotype IAIB) can produce two types of gametes: IA and IB.
- The O parent (genotype ii) can only produce one type of gamete: i.

3. **Set Up the Punnett Square**:
- Create a Punnett square to visualize the possible combinations of alleles from the parents.
- The gametes from the AB parent (IA and IB) will be on one side, and the gametes from the O parent (i) will be on the other side.

```
IA | IB
-----------------
i | IAi | IBi
-----------------
i | IAi | IBi
```

4. **Analyze the Offspring Genotypes**:
- From the Punnett square, the possible genotypes of the children are:
- IAi (which corresponds to blood group A)
- IBi (which corresponds to blood group B)

5. **Determine the Possible Blood Groups**:
- The possible blood groups for the children based on the genotypes are:
- Blood group A (from genotype IAi)
- Blood group B (from genotype IBi)

6. **Conclusion**:
- Therefore, the possible blood groups of the children from a couple with blood groups AB and O are A and B.

### Final Answer:
The possible blood groups of the children would be A or B.

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