In Mendel's seven contrasting traits of pea total number of colours tested by him was

Options

A. 2
B. 3
C. 4
D. 5

Answer

To solve the question regarding the total number of colors tested by Mendel in his experiments on pea plants, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Traits Studied by Mendel**: Mendel studied seven contrasting traits in garden peas. These traits included flower color, seed color, pod shape, pod color, seed shape, flower position, and stem length.

2. **Focus on Color Traits**: Among these traits, we need to focus specifically on the color traits. Mendel tested the following color traits:
- **Seed Color**: Yellow (dominant) and Green (recessive)
- **Flower Color**: Purple (dominant) and White (recessive)
- **Pod Color**: Green (dominant) and Yellow (recessive)

3. **Count the Distinct Colors**: From the traits mentioned:
- For seed color, there are 2 colors (Yellow and Green).
- For flower color, there are 2 colors (Purple and White).
- For pod color, there are also 2 colors (Green and Yellow).

4. **Total Number of Colors**: Now, we combine the distinct colors from these traits. However, since we are looking for the total number of unique colors tested, we can summarize:
- Yellow
- Green
- Purple
- White

This gives us a total of 4 distinct colors.

5. **Final Answer**: Therefore, the total number of colors tested by Mendel in his experiments is **4**.