But if nondisjunction takes place, what that means is one of these fibers actually fails to form a proper connection with one of the cystochromatids. And so let's say that this connection formed, this connection formed, and this connection formed. This connection did not actually form. And so now what happens during anaphase when these fibers begin to pull these cystochromatids apart? These are pulled apart correctly, so these begin moving to opposite poles, but this one doesn't move apart correctly. In fact, this pair of identical cystochromatids moves to the other side, to one side, and this one fails to move to this side.