One of the following did not consitute the seven contrasting pairs of characters noticed by Mendel

Options

A. Height of the plants
B. Shape of the leaves
C. Shape of pod
D. Colour of pod

Answer

To solve the question regarding which of the following did not constitute the seven contrasting pairs of characters noticed by Mendel, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Mendel's Work**: Gregor Mendel conducted experiments on pea plants (Pisum sativum) between 1856 and 1863. He identified seven contrasting pairs of traits in these plants.

2. **List the Seven Contrasting Pairs of Characters**: The seven pairs of contrasting traits that Mendel studied are:
- Height of the plant (tall vs. short)
- Color of the seed (yellow vs. green)
- Shape of the seed (round vs. wrinkled)
- Color of the pod (yellow vs. green)
- Shape of the pod (inflated vs. constricted)
- Color of the flower (purple vs. white)
- Position of the flower (axial vs. terminal)

3. **Analyze the Options**: Now, let's look at the options provided:
- Option 1: Height of the plants (This is one of Mendel's traits)
- Option 2: Shape of the leaves (This was not one of Mendel's traits)
- Option 3: Shape of the pod (This is one of Mendel's traits)
- Option 4: Color of the pod (This is one of Mendel's traits)

4. **Identify the Correct Answer**: From the analysis, we can see that the "shape of the leaves" is not one of the seven contrasting pairs of characters that Mendel studied. Therefore, the correct answer is **Option 2: Shape of the leaves**.

### Final Answer:
**Option 2: Shape of the leaves did not constitute the seven contrasting pairs of characters noticed by Mendel.**