Alleles for gene I are `I^(A),I^(B)` and `I^(O)`. If `I^(A)` and `I^(B)` are dominant over `I^(O)`, the `I^(A)=I^(B) gt I^(O)` indicates

Options

A. Codominance
B. Recessive
C. Weiner hypothesis
D. Dominance

Answer

To solve the question regarding the alleles for gene I, we need to analyze the relationship between the alleles `I^(A)`, `I^(B)`, and `I^(O)`.

### Step-by-Step Solution:

1. **Identify the Alleles**: The alleles for the gene I are `I^(A)`, `I^(B)`, and `I^(O)`. Here, `I^(A)` and `I^(B)` represent the alleles for blood groups A and B, respectively, while `I^(O)` represents the allele for blood group O.

2. **Understand Dominance**: According to the information given, `I^(A)` and `I^(B)` are dominant over `I^(O)`. This means that if either `I^(A)` or `I^(B)` is present in an individual, the phenotype (observable trait) will reflect the presence of A or B blood group, respectively.

3. **Analyze the Expression**: The expression `I^(A) = I^(B) > I^(O)` indicates that both `I^(A)` and `I^(B)` are equally dominant over `I^(O)`. This means that if an individual has one allele for A and one for B (heterozygous condition), they will express both A and B antigens, leading to the AB blood group.

4. **Conclusion on Dominance**: The notation `I^(A) = I^(B)` signifies that both alleles are codominant with respect to each other, but they are dominant over `I^(O)`. Therefore, the correct interpretation of the expression is that it illustrates the dominance relationship among these alleles.

5. **Final Answer**: The statement `I^(A) = I^(B) > I^(O)` indicates the dominance of `I^(A)` and `I^(B)` over `I^(O)`, and it also shows that `I^(A)` and `I^(B)` are codominant to each other.