So to see what we mean, let's suppose we have this process that actually takes place correctly. So let's assume meiosis one takes place correctly and we produce a daughter cell that consists of three of these chromosomes. That itself consists of two cystochromatids. So each chromosome consists of its own set of chromatids. So now these chromatids are not cystochromatids, meaning they're not identical, as we saw in this case because in meiosis, we have the process of crossing over that takes place. So once again, let's suppose a spindle fiber does not correctly attach to the centromere of one of these chromosomes.