Mendel did not propose the theory of -

Options

A. dominance
B. incomplete dominance
C. segregation
D. independent assortment

Answer

To answer the question "Mendel did not propose the theory of -", we need to analyze the options provided and identify which concept was not part of Mendel's original theories.

### Step-by-Step Solution:

1. **Understanding Mendel's Contributions**:
- Gregor Mendel is known as the father of genetics. He conducted experiments with pea plants and formulated the foundational principles of inheritance.

2. **Identifying Mendel's Laws**:
- Mendel proposed three main laws:
- **Law of Dominance**: This law states that when two different alleles are present, one allele (dominant) can mask the expression of the other (recessive).
- **Law of Segregation**: This law explains that during the formation of gametes, the two alleles for a trait segregate from each other, so that each gamete carries only one allele for each trait.
- **Law of Independent Assortment**: This law states that the alleles for different traits are distributed to gametes independently of one another.

3. **Evaluating the Options**:
- The options given are:
- Dominance
- Incomplete Dominance
- Segregation
- Independent Assortment
- From the analysis, we can see that Dominance, Segregation, and Independent Assortment are all part of Mendel's theories.

4. **Identifying the Correct Answer**:
- **Incomplete Dominance** is not one of Mendel's original theories. It is a concept that was discovered later and refers to a situation where the phenotype of heterozygotes is intermediate between the phenotypes of the two homozygotes.

5. **Conclusion**:
- Therefore, the correct answer to the question "Mendel did not propose the theory of -" is **Incomplete Dominance**.

### Final Answer:
Mendel did not propose the theory of **Incomplete Dominance**.