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. 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.