So let's assume that first, let's assume that the individual is this right over here. If the individual was this, then we have the Xcel. So one type of Xcel, which is that, and then we have this type of sperm cell or this one from the male parent. And so if we carry out this crossing process, we get X uppercase B, x lowercase B, x uppercase B, x lowercase B. Okay? And actually we don't have to do well, yeah, let's continue, let's finish this up.