How do Mendel’s experiments show that traits are inherited independently?

Explanation

Mendel crossed pea plants having round green seeds (RRyy) with pea plants having wrinkled yellow seeds (rrYY).

Since the `F_(1)` plants are formed after crossing pea plants having green round seeds and pea plants having yellow wrinkled seeds, `F_(1)` generation will have both these characters in them. However, as we know that yellow seed colour and round seeds are dominant characters, therefore, the `F_(1)` plants will have yellow round seeds. Then this `F_(1)` progeny was self-pollinated and the `F_(2)` progeny was found to have yellow round seeds, green round seeds, yellow wrinkled seeds, and green wrinkled seeds in the ratio of 9:3:3:1.

In the above cross, more than two factors are involved, and these are independently inherited.