which of the following example of intragenic inheritance was not discovered by Mendel?

Options

A. Co-dominance
B. Incomplete dominance
C. complete dominance
D. None

Answer

To solve the question "Which of the following examples of intragenic inheritance was not discovered by Mendel?", we will analyze the options provided:

1. **Co-dominance**
2. **Incomplete dominance**
3. **Complete dominance**
4. **None**

### Step-by-Step Solution:

**Step 1: Understand Intragenic Inheritance**
- Intragenic inheritance refers to the interaction of alleles within a single gene or locus. This can involve different patterns of dominance among alleles.

**Hint for Step 1:** Remember that intragenic inheritance deals with how different alleles of the same gene interact with each other.

**Step 2: Identify the Types of Dominance**
- **Complete Dominance:** This is when one allele completely masks the effect of another allele. This concept was introduced by Gregor Mendel through his pea plant experiments.

**Hint for Step 2:** Complete dominance is the classic Mendelian inheritance pattern where one trait is fully expressed over another.

- **Co-dominance:** In this case, both alleles are fully expressed in the phenotype. For example, in blood types, both A and B alleles can be expressed together (AB blood type). This was not discovered by Mendel.

**Hint for Step 3:** Co-dominance shows both traits distinctly without blending.

- **Incomplete Dominance:** This occurs when the phenotype is a blend of the two alleles. An example is the crossing of red and white flowers resulting in pink flowers. This was described by Carl Correns, not Mendel.

**Hint for Step 4:** Incomplete dominance results in a third phenotype that is a mix of the two parental traits.

**Step 3: Analyze the Options**
- **Complete Dominance:** Discovered by Mendel.
- **Co-dominance:** Not discovered by Mendel.
- **Incomplete Dominance:** Not discovered by Mendel.
- **None:** This option implies that all the examples were discovered by Mendel, which is incorrect.

**Step 4: Conclusion**
Since both co-dominance and incomplete dominance were not discovered by Mendel, the correct answer to the question is "None," indicating that none of the examples listed were discovered by Mendel.

### Final Answer:
The correct option is **None**.