The centromere is the point where two identical sister chromatids join.
The centromere is a region of highly condensed DNA near the centre of a chromosome.
This essential chromosomal sequence is found in all eukaryotic chromosomes. Centromeres do not code for RNA or polypeptides. Centromeres are therefore classified as non-coding DNA.
Sister chromatids are the identical chromosomes that are the result of DNA replication.
The chromatids remain attached until the cell prepares for mitosis or meiosis.