It tells us that the trade was not lost even though the f one generation was always tall. We see that because we see the short offspring in the f two generation that trade must not be lost. It must still exist within that plant because it reappears in this f two generation. So Gregor Mendel concluded that because the short trade reappeared in the second f two generation, that trade for the short plant was not lost during that mating process, during that crossing process. And this led directly into the principle of dominance. So Gregor Mendel argued that each trait in a given plant is controlled by two hereditary factors.