If dominant alleles of two gene loci produce the same phenotype whether separately or together. It will be

Options

A. Recessive epistasis
B. Dominant epistasis
C. Duplicate genes interaction
D. Inhibitory genes interaction

Answer

To solve the question regarding the interaction of dominant alleles of two gene loci that produce the same phenotype whether separately or together, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Gene Interaction**:
- We need to recognize that the question is about how two different genes (located at different loci) can interact to produce a similar phenotype.

2. **Identifying the Type of Interaction**:
- The interaction described in the question is known as "duplicate gene interaction." This occurs when two different genes can produce the same phenotype independently or together.

3. **Recognizing the Phenotypic Ratio**:
- In duplicate gene interaction, the phenotypic ratio observed in the offspring is 15:1. This indicates that the presence of either dominant allele from either gene will lead to the dominant phenotype.

4. **Characteristics of Duplicate Genes**:
- Duplicate genes are independent and located on different chromosomes. They do not show a cumulative effect, meaning that the presence of both dominant alleles does not enhance the phenotype beyond what is produced by one dominant allele alone.

5. **Conclusion**:
- Based on the above understanding, we can conclude that if dominant alleles of two gene loci produce the same phenotype whether separately or together, it is referred to as "duplicate gene interaction."

### Final Answer:
The correct answer is **duplicate gene interaction**.

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