So mitosis is the process by which a somatic cell in our body chooses to divide. And that somatic cell produces two identical daughter cells that have the same exact genetic information. So what happens during mitosis, during interface, what happens is every single one of these chromosomes is replicated. So this chromosome is replicated, this chromosome is replicated, this one is replicated, this one is replicated, and so forth. And let's say if this one is replicated, what we produce is a pair of identical cystochromatids. Remember, cystochromatids are two chromosomes that are exactly the same.