During mitosis, what do we call the identical strands into which a chromosome divides?

During mitosis, the identical strands into which a chromosome divides are called chromatids. When a chromosome is replicated, it consists of two identical halves known as sister chromatids, which are joined together at a region called the centromere. This structure ensures that when the cell divides, each new daughter cell receives an identical set of chromosomes, with one chromatid from each pair going to each daughter cell.

Chromatin refers to the complex of DNA and proteins that forms chromosomes within the nucleus of eukaryotic cells, primarily during interphase, when the DNA is not condensed. The centromere is the specific region that links the two sister chromatids together and is critical for their proper separation during cell division but is not the name for the strands themselves. Nucleosomes are the fundamental units of DNA packaging, consisting of DNA wrapped around histone proteins, which play a role in the structural organization of chromatin but are not related to the specific process of mitosis or the division of chromosomes.