A man with blood group B and woman with blood group O, will have children with blood group

Options

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

Answer

To determine the possible blood groups of children from a man with blood group B and a woman with blood group O, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Genotypes of the Parents**:
- The man with blood group B can have two possible genotypes:
- Homozygous: \( I_B I_B \)
- Heterozygous: \( I_B I_O \)
- The woman with blood group O has the genotype:
- Homozygous: \( I_O I_O \)

2. **Set Up the Punnett Square**:
- We will consider both scenarios for the man’s genotype.
- First, let’s consider the heterozygous condition for the man (\( I_B I_O \)):
- The possible gametes from the man are \( I_B \) and \( I_O \).
- The possible gametes from the woman are \( I_O \) and \( I_O \).
- The Punnett square will look like this:

| | \( I_O \) | \( I_O \) |
|---------|-----------|-----------|
| \( I_B \) | \( I_B I_O \) | \( I_B I_O \) |
| \( I_O \) | \( I_O I_O \) | \( I_O I_O \) |

3. **Determine the Blood Groups from the Punnett Square**:
- From the Punnett square, the possible genotypes of the children are:
- \( I_B I_O \) (Blood group B)
- \( I_O I_O \) (Blood group O)
- Therefore, the children can have either blood group B or blood group O.

4. **Conclusion**:
- If the man is homozygous (\( I_B I_B \)), all children will have blood group B. However, since we are considering the heterozygous condition, the children can have either blood group B or blood group O.

### Final Answer:
The children of a man with blood group B and a woman with blood group O can have blood groups B or O.

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