Two dominant independently assorting genes react with each other. They are

Options

A. Complementary
B. Supplementary
C. Duplicate
D. Collaborative.

Answer

To solve the question regarding the interaction of two dominant independently assorting genes, we will analyze the options provided and determine which type of gene interaction is being described.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about two dominant independently assorting genes that react with each other. This means we are looking for a type of gene interaction where both genes are necessary for a particular phenotype to be expressed.

2. **Analyzing the Options**:
- **Complementary Genes**: These are genes that work together to produce a specific phenotype. Both genes must be present for the dominant phenotype to be expressed. This matches our requirement.
- **Supplementary Genes**: These genes also interact but do not necessarily require both to express a phenotype. They can enhance or modify the expression of another gene but are not dependent on each other for the expression of a phenotype.
- **Duplicate Genes**: These genes can be present on different chromosomes but produce the same phenotype. They do not interact in the way described in the question.
- **Collaborative Genes**: These genes work together to produce a specific trait, but they may not be required in the same way as complementary genes.

3. **Choosing the Correct Option**: Based on the definitions:
- Complementary genes are the correct answer because they require both dominant alleles to express a new phenotype. Therefore, the correct option is **Complementary Genes**.

4. **Final Answer**: The correct answer to the question is **Complementary Genes**.