And so instead of this attaching here and this attaching here, let's say what happens is this attaches here and also attaches there. And so now what happens is we have nondisjunction takes place and both of these pairs of chromosomes basically move to one side of the pole. And so when we have when we produce those two cells, one of the cells will lack the sex chromosome and the other one will have an extra pair of sex chromosomes. So this is where nondisjunction took place in meiosis one, in anaphase one of meiosis. Now, let's suppose we have metaphase two take place, and metaphase two takes place normally. So all these chromosome pairs line up at the equator as shown, and these fibers form correctly.