chromosome
left The DNA double helix wraps around proteins 2 and tightly coils a number of times to form a chromosome 5 . This figure shows the complexity of the coiling process. The red dot shows the location of the centromere, where the microtubules attach during mitosis and meiosis. right A representation of a condensed eukaryotic chromosome, as seen after the DNA has been copied. The chromosome is made of two identical, or sister, chromatids held together by a centromere.