Mendel used a dihydrid cross between pure pea plants to show that traits are inherited cross between pure pea plants to show that traits are inherited independently. He selected a pea plant with round yellow (RRYY) & wrinkled green (rryy). The obtained phenotypic ratio in F2 generation was 9 : 3 : 3 : 1.
This shows that the two characteristics ‘K’ & ‘Y’ are not linked to each other, so they are independently inherited.
