Mendel performed cross-breeding experiments on garden pea (Pisum sativum).
Although he studied the inheritance of seven different pairs of contrasting characters in this plant, he considered only one pair at a time.
He crossed two pea plants having contrasting characters (e.g., tall and dwarf pea plants) by artificial pollination and obtained the hybrids.
The resulting hybrid plants were then crossed with each other. He obtained the data from these crosses and analyzed the results carefully.