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. And so at the end, when we produce our two daughter cells, these will no longer be identical because they will not carry the same amount of genetic information. In this particular case, we're going to have a daughter cell, a somatic cell that has one extra chromosome than it should have. So we have a trisomic condition, and this one will lack that particular chromosome, and so it will have a monosomic condition.