The genotype of blood group 'B' is `

Options

A. `I^(A)I^(A)//I^(A)I^(O)`
B. `I^(B)I^(B)//I^(B)I^(O)`
C. `I^(A)I^(B)`
D. `I^(O)I^(O)`

Answer

To determine the genotype of blood group 'B', we need to understand the genetics behind blood groups. Here’s a step-by-step solution:

### Step 1: Understand Blood Group Alleles
Blood groups are determined by multiple alleles: IA, IB, and IO.
- IA corresponds to blood group A.
- IB corresponds to blood group B.
- IO corresponds to blood group O.

### Step 2: Identify Dominant and Recessive Alleles
Both IA and IB are dominant alleles, while IO is recessive. This means:
- If an individual has at least one IA allele, they will have blood group A.
- If an individual has at least one IB allele, they will have blood group B.
- An individual will have blood group O only if they have two IO alleles (IO, IO).

### Step 3: Determine Genotypes for Blood Group B
For blood group B, the possible genotypes are:
1. IBIB (homozygous for B)
2. IBIO (heterozygous for B)

### Step 4: Eliminate Other Options
- Genotype IA, IA corresponds to blood group A.
- Genotype IA, IB corresponds to blood group AB.
- Genotype IO, IO corresponds to blood group O.

### Conclusion
The genotypes that correspond to blood group B are IBIB and IBIO. Therefore, the correct answer is option B: IBIB or IBIO.

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