Write the pairs of contrasting characters of the position of flower, colour of unripe pod, shape of ripe pod and colour of cotyledons, which Mendel had related for his experiments on cross-breeding in garden pea.

Explanation

To answer the question regarding the pairs of contrasting characters that Mendel studied in his experiments on cross-breeding in garden pea, we can outline the following steps:

### Step-by-Step Solution:

1. **Understanding Contrasting Characters**:
- Contrasting characters are traits that have two distinct forms. For example, a plant can either be tall or dwarf, which are two contrasting forms of height.

2. **Position of Flower**:
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