And these are the four possibilities for the gametes for parent number one. And so essentially we're going to get 16 different possibilities for the offspring. So let's actually carry out the pond and square crossing. So we have, remember, the g's pair together and the t's also pair together. So this multiplied by this gives us uppercase g, uppercase g. So uppercase g, uppercase g and uppercase t, uppercase T. Now what about this one? We get uppercase g, uppercase g, we get uppercase T, lowercase T, because this gammy, when they fuse, gives the lowercase T chromosome.