chromatid One of the two daughter strands of a chromosome that has undergone division during interphase. Chromatids are joined together by a single centromere, usually positioned in the centre of the pair as they lie beside one another. When the centromere divides at anaphase of mitosis or anaphase II of meiosis, the sister chromatids become separate chromosomes.

chromatid One of the two daughter strands of a chromosome that has undergone division. Chromatids are joined together by a single centromere, usually positioned in the centre of the pair as they lie beside one another. When the centromere divides at the anaphase of mitosis or the second stage of meiosis (meiosis II), the sister chromatids become separate chromosomes.

chromatid A threadlike strand formed from a chromosome during the early stages of cell division. Each chromosome divides along its length into two chromatids, which are at first held together at the centromere. They separate completely at a later stage. The DNA of the chromosome reproduces itself exactly so that each chromatid has the complete amount of DNA and becomes a daughter chromosome with exactly the same genes as the original chromosome from which it was formed.

chromatid One of the two daughter strands of a chromosome that has undergone division. Chromatids are joined together by a single centromere, usually positioned in the centre of the pair as they lie beside one another. When the centromere divides during the third stage (anaphase) of cell division (mitosis or meiosis), the sister chromatids become separate chromosomes.

chro·ma·tid / ˈkrōməˌtid/ • n. Biol. each of the two threadlike strands into which a chromosome divides longitudinally during cell division. Each contains a double helix of DNA.