* Controlled Experiments: Mendel meticulously controlled his pea plant experiments, focusing on specific traits like flower color, seed shape, and plant height. This allowed him to isolate and track the inheritance of individual traits.

* Discrete Traits: Mendel chose traits that were easy to distinguish, like purple versus white flowers. This made it simple to observe and quantify the inheritance patterns.

* Statistical Analysis: Mendel used statistical analysis to analyze his results, allowing him to identify consistent patterns in inheritance. This was crucial in developing his laws.

* Law of Segregation: Mendel's experiments demonstrated that each parent contributes one allele (version of a gene) for a trait to their offspring. This means that offspring inherit half of their genetic material from each parent.

* Law of Independent Assortment: Mendel discovered that different traits are inherited independently of each other. This means that the inheritance of one trait doesn't affect the inheritance of another.

In essence, Mendel's work with pea plants laid the groundwork for understanding how traits are passed down through generations. His findings were the first concrete evidence for the existence of genes and paved the way for modern genetics.