An example of codominance is

Options

A. Eye colour is Drosophilia
B. Seed shape and colour in pea
C. AB blood group in man
D. Haemophilia in man

Answer

### Step-by-Step Solution:

1. **Understanding Codominance**: Codominance is a genetic phenomenon where both alleles in a heterozygous individual are fully expressed, resulting in a phenotype that is neither dominant nor recessive. This means that both traits appear simultaneously in the organism.

2. **Identifying the Options**: The question provides four options:
- A) Eye color in Drosophila
- B) Seed shape and color in Pea
- C) AB blood group in man
- D) Hemophilia in man

3. **Analyzing Each Option**:
- **Option A (Eye color in Drosophila)**: This is an example of multiple allelism, not codominance.
- **Option B (Seed shape and color in Pea)**: This represents simple dominance where one trait masks the other, so it is not codominance.
- **Option C (AB blood group in man)**: This is a classic example of codominance. In individuals with AB blood type, both A and B alleles are expressed equally.
- **Option D (Hemophilia in man)**: This condition is an example of sex-linked inheritance, not codominance.

4. **Conclusion**: The only option that exemplifies codominance is **C) AB blood group in man**.

### Final Answer:
The correct answer is **C) AB blood group in man**.

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