What were the results of first, second and third generations?

Explanation

### Step-by-Step Solution:

1. **Understanding the Generations**:
- The first generation in Mendel's experiments is referred to as the **P (Parental) Generation**. This generation consists of the original parent plants that Mendel crossed.

2. **Results of the First Generation (F1)**:
- When Mendel crossed the parent plants, he collected the seeds produced, which resulted in the **F1 Generation** (first filial generation).
- The key observation here is that all the F1 offspring expressed one trait from one of the parental plants, which is known as the **dominant trait**. The other trait, which did not appear in the F1 generation, is referred to as the **recessive trait**.
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