These two go this way, and these two go this way. But what actually takes place is this entire tetrad. The pair of homologous chromosomes, or recombinant chromosomes end up being dragged to the left side of the cell. So when our cell division actually takes place, one of our daughter cells consists of one extra chromosome and two extra chromatids while the other cell consists of one less chromosome and two less chromatids. So during the beginning of anaphase one of meiosis one, the tetras are pulled apart to opposite poles. nondisjunction will cause a tetra to move to one side, ultimately leading to a cell with one extra chromosome and two extra chromatids, while the other cell will contain one less chromosome and two less chromatids.