How did Mendel use self‑pollination and cross‑pollination techniques in his experiments with flower color to observe the basic patterns of inheritance?

Mendel carried out the inheritance experiment by cross pollinating the first fillia generation; the parent generation contained different colour of flowers. He then observed the patterns in the second fillia generation (F2).

Pea plant flowers of two colors were used i. e., Purple and White. He observed the same ratio in both cases (3:1), in the self and cross pollination. This happens because of the assumptions in Law of Segregation and Law of Independent assortment. He concluded that the purple color is the Dominant and white in recessive as in both self and cross pollination procedures.