And the same thing is true for chromosome number two and chromosome number three. So, for this particular cell, we have three chromosomes lined up at the center at metaphase of mitosis. In the case of human somatic cells, we actually have 46 of these chromosomes lined up at the center during metaphase of mitosis. So at metaphase, we basically line up all our chromosomes along the center, as shown, and the two centrioles are found on opposite sides. And the centriole synthesize fibers known as spindle fibers. And if disjunction actually takes place correctly, what happens is each spindle fiber attaches to each side of our chromosome.