What will be possible blood group in children from the parents with B and AB blood groups ?

Options

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

Answer

To determine the possible blood groups of children from parents with B and AB blood groups, we can follow these steps:

### Step 1: Identify the Genotypes of the Parents
- The blood group B can have two possible genotypes:
- Genotype 1: \( I^B I^B \) (homozygous)
- Genotype 2: \( I^B i \) (heterozygous)
- The blood group AB has a specific genotype:
- Genotype: \( I^A I^B \)

### Step 2: Set Up the Punnett Square
Assuming the B parent is heterozygous (\( I^B i \)), we can set up a Punnett square to determine the possible genotypes of the children.

| | \( I^A \) | \( I^B \) |
|---------|-----------|-----------|
| \( I^B \) | \( I^A I^B \) (AB) | \( I^B I^B \) (B) |
| \( i \) | \( I^A i \) (A) | \( I^B i \) (B) |

### Step 3: Determine the Possible Blood Groups
From the Punnett square, we can see the possible genotypes for the children:
- \( I^A I^B \) → Blood group AB
- \( I^B I^B \) → Blood group B
- \( I^A i \) → Blood group A
- \( I^B i \) → Blood group B

### Step 4: List the Possible Blood Groups
The possible blood groups for the children are:
- A
- B
- AB

### Conclusion
Thus, the possible blood groups in children from parents with B and AB blood groups are A, B, and AB.