And two of these experiments are shown on the board and it's these two experiments that eventually led the way to the principle of dominance as we'll see in just a moment. Now, before he actually conducted these two experiments and many experiments like it he spent several years trying to develop a type or a line of pea plants known as the true breeding line of pea plants. Now, what exactly do we mean by a true breed? Well, a true breed is a type of plant that if you made it with itself it will produce that same trait over and over, generation after generation. So to see an example, let's consider the following case. Let's suppose we have a male individual who is true breed for the color blue.