Now, because we only have 1% of this Ddatp, this DNA polymerase will only sometimes use the Ddatp. Usually it's going to use the normal dATP molecule. And if it uses the normal dATP that contains the hydroxyl, then it will continue synthesizing those fossil diester bonds and so we can produce fragment number two. So if this was normal, then it will continue. So the DNA polymerase would add the thymine, then the guanine, then the cytosine, then the thiamine. And now it comes to a T. So that means there is once again the possibility for an A.