So upper case T, lowercase T. Now, no matter how many times he conducted this experiment, he always got a tall offspring. So what that means is even though that lowercase T is inside that offspring, only the uppercase T is actually expressed. And so what that implies is that uppercase T is dominant over the lowercase T, which is recessive. And by dominant means that uppercase T inhibits that lowercase T from expressing that short trait. So in the f one generation offspring, the hereditary factor of the tall pair and uppercase t seemed to mask or inhibit the expression of the hereditary factor that came from that short parent lowercase t. And in such a case, we say that the tall hereditary fact, the upper case t is dominant over that lowercase t, the short one, which is said to be recessive. And this is precisely what the principle of dominance is.