Which of these are an incorrect matched pair of the post - mendelian phenomenon and its example ?

Options

A. Incomplete dominance - Antirrhinum majus
B. Co - dominance - The type of wings in Drosophila
C. Pleiotropy - Sickle cell anemia gene
D. Polygenes - wheat kernel colour

Answer

To solve the question of identifying the incorrect matched pair of the post-Mendelian phenomenon and its example, we can follow these steps:

### Step 1: Understand the Post-Mendelian Phenomena
Post-Mendelian phenomena include concepts like incomplete dominance, co-dominance, pleiotropy, and polygenic inheritance. Each of these phenomena has specific characteristics and examples.

### Step 2: Analyze Each Option
We need to evaluate each option provided in the question to determine if it correctly matches the phenomenon with its example.

1. **Incomplete Dominance in Antirrhinum (Snapdragon)**:
- Incomplete dominance occurs when the heterozygote exhibits a phenotype that is intermediate between the two homozygotes. In Antirrhinum, red (RR) and white (rr) flowers produce pink (Rr) flowers. This match is **correct**.

2. **Co-dominance and Drosophila Wings**:
- Co-dominance occurs when both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits. In Drosophila, there are various wing morphologies, but they do not exhibit co-dominance. This match is **incorrect**.

3. **Pleiotropy and Sickle Cell Anemia**:
- Pleiotropy occurs when one gene influences multiple phenotypic traits. In sickle cell anemia, one gene affects the shape of red blood cells and also provides resistance to malaria. This match is **correct**.

4. **Polygenic Inheritance and Wheat Kernel Color**:
- Polygenic inheritance involves multiple genes contributing to a single trait, which results in a continuous range of phenotypes. Wheat kernel color is controlled by multiple genes, making this match **correct**.

### Step 3: Identify the Incorrect Match
From the analysis, the only incorrect match is:
- **Co-dominance and Drosophila Wings** (Option B).

### Final Answer
The incorrect matched pair of the post-Mendelian phenomenon and its example is **Option B: Co-dominance and Drosophila Wings**.

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