Differential interference contrast (DIC) light micrograph of a cell in the anaphase stage of mitosis (nuclear division). Mitosis is the formation of two daughter nuclei from one parent nucleus. At anaphase sister chromatids, which are made of DNA (deoxyribonucleic acid, purple), are separated to opposite ends of the cell. Two identical chromatids make up one chromosome, so each cell retains a copy of the parent cell's genetic information. Giemsa staining.