Example of polygenic inheritance

Options

A. Flower colour in Mirabilis Jalapa
B. Skin colour in dogs
C. Skin colour in humans
D. None of these

Answer

### Step-by-Step Solution:

1. **Understanding Polygenic Inheritance**:
- Polygenic inheritance refers to the inheritance pattern where multiple genes (often located on different chromosomes) influence a single trait. This results in a continuous range of phenotypes rather than discrete categories.

2. **Identifying Examples**:
- To identify an example of polygenic inheritance, we need to look for traits that are controlled by more than one gene. Common traits that exhibit polygenic inheritance include skin color, height, and weight in humans.

3. **Evaluating the Options**:
- **Option 1**: Flower color in Mirabilis Jalapa - This is an example of incomplete dominance, not polygenic inheritance.
- **Option 2**: Skin color in dogs - This is not a well-documented example of polygenic inheritance.
- **Option 3**: Skin color in humans - This is a classic example of polygenic inheritance as multiple genes contribute to the variation in skin color.

4. **Conclusion**:
- Based on the evaluation of the options, the correct answer is **Skin color in humans**, as it is influenced by multiple genes leading to a range of skin tones.