And we also have the process of cytokinesis that actually divides the cell membrane and the cytoplasm of our cell. Now, during the process of s phase of interphase, which takes place right before mitosis, we actually replicate each one of our chromosomes. So let's suppose we begin with a cell that consists of one, two, three chromosomes. So during interphase, we have to replicate each one of the chromosomes. And that's exactly why each one of these chromosomes consist of two identical chromatids known as cystochromatids. So chromosome one consists of one two identical cystic chromatids.