Which of the following is the example of codomiance :-

Options

A. `Hb^(A) Hb^(A),I^(A)I^(B)`
B. `Hb^(s)Hb^(s),I^(A)I^(B)`
C. `Hb^(A)Hb^(s),I^(A)I^(B)`
D. `Hb^(s)Hb^(s),I^(A)I^(A)`

Answer

To determine which of the given options is an example of codominance, we first need to understand the concept of codominance in genetics.

### Step-by-Step Solution:

1. **Understanding Codominance**: Codominance occurs when both alleles in a heterozygous genotype are fully expressed, resulting in a phenotype that is neither dominant nor recessive. This means that both traits are visible in the organism.

2. **Identifying Examples**: Common examples of codominance include:
- **Sickle Cell Anemia**: In sickle cell anemia, individuals with one normal allele (HBA) and one sickle cell allele (HBS) (genotype HBA/HBS) exhibit traits of both normal and sickle-shaped red blood cells. This is a classic example of codominance.
- **ABO Blood Grouping**: In the ABO blood group system, individuals with genotype IAIB express both A and B antigens on their red blood cells, resulting in blood type AB. This is also an example of codominance.

3. **Evaluating Options**:
- If the options provided include genotypes or conditions related to sickle cell anemia and ABO blood grouping, we can analyze them:
- **Option with HBA/HBS**: This represents a carrier for sickle cell anemia and is an example of codominance.
- **Option with IAIB**: This represents blood type AB and is also an example of codominance.
- **Options with homozygous conditions (e.g., AA or BB)**: These do not represent codominance because they express only one trait.

4. **Conclusion**: Based on the understanding of codominance and the evaluation of the examples, the correct answer would be the option that includes either HBA/HBS (sickle cell anemia carrier) or IAIB (AB blood type), as both demonstrate codominance.

### Final Answer:
The examples of codominance are:
- Sickle Cell Anemia (HBA/HBS)
- ABO Blood Grouping (IAIB)