Mendel did not propose:

Options

A. Dominance
B. Incomplete dominance
C. Segregation
D. Independent assortment.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which concept was not proposed by Mendel among the options given: dominance, incomplete dominance, segregation, and independent assortment.

2. **Identifying Mendel's Contributions**:
- **Dominance**: Mendel proposed the law of dominance, which states that when two contrasting alleles for a trait are present, one allele (the dominant one) is expressed while the other (the recessive one) is not.
- **Segregation**: Mendel also proposed the law of segregation, which states that during the formation of gametes, the two alleles for a trait separate so that each gamete carries only one allele for each trait.
- **Independent Assortment**: Mendel's law of independent assortment states that the alleles of different genes assort independently of one another during gamete formation.

3. **Identifying the Incorrect Option**:
- **Incomplete Dominance**: This concept was not proposed by Mendel. Instead, it was introduced by Karl Correns. In incomplete dominance, the phenotype of the heterozygous individual is a blend of the dominant and recessive traits, rather than one trait being completely dominant over the other.

4. **Conclusion**: Based on the analysis, the correct answer to the question is **incomplete dominance**, as this was not proposed by Mendel.

**Final Answer**: Mendel did not propose **incomplete dominance**.

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