Possible blood groups of children born to parents having A and AB groups are

Options

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

Answer

To determine the possible blood groups of children born to parents with blood groups A and AB, we can follow these steps:

### Step 1: Identify the Genotypes of the Parents
- The parent with blood group A can have two possible genotypes: AA or AO. However, since we are considering the most common scenario, we will assume the genotype is AO (where A is dominant and O is recessive).
- The parent with blood group AB has the genotype AB.

### Step 2: Set Up the Punnett Square
- We will set up a Punnett square to visualize the potential combinations of alleles from the parents.
- The alleles from the AO parent (A and O) will be placed on one side of the square, and the alleles from the AB parent (A and B) will be placed on the other side.

### Step 3: Fill in the Punnett Square
- The combinations will be as follows:
- From AO (A and O) and AB (A and B):
- A (from AO) + A (from AB) = AA
- A (from AO) + B (from AB) = AB
- O (from AO) + A (from AB) = OA
- O (from AO) + B (from AB) = OB

### Step 4: Determine the Possible Blood Groups
- The resulting genotypes from the Punnett square are:
- AA (Blood group A)
- AB (Blood group AB)
- OA (Blood group A)
- OB (Blood group B)

- Therefore, the possible blood groups of the children are:
- A (from AA and OA)
- AB (from AB)
- B (from OB)

### Conclusion
The possible blood groups of children born to parents with blood groups A and AB are A, AB, and B.