One of two thread-like daughter strands of DNA that form when a chromosome divides longitudinally through the action of a spindle during metaphase of mitosis or during anaphase of meiosis to become separate chromosomes, which were held together by one or more centromeres before mitosis began.
See Anaphase, Centromere, Chromatin, Chromosome, DNA (deoxyribonucleic acid), Meiosis (or reduction division), Metaphase, Microtubules, Mitosis, Non-dysjunction, Spindle