During dihybrid cross by Mendel, it was observed that when two pairs of traits were considered; each trait expressed independent of the other.
When a pea plant having round green seeds is crossed with a pea plant having wrinkled yellow seeds in F1 generation all the plants have round yellow seeds. But in F2 generation two new traits that is round yellow and wrinkled green appear. This
shows that traits are inherited independently.
Mendel was able to propose the Law of Independent Assortment which says about independent inheritance of traits.
