DNA interacts with histones to form nucleosomes. Prokaryotes typically have a single chromosome. Prokaryotes typically divide by meiosis. I consists of two chromatids. I spontaneous mutations in skin cells spontaneous mutation in sperm or egg DNA 43.
Chromosomes contain both DNA and proteins.
Eukaryote chromosomes sometimes consist of two chromatids. In eukaryotes, DNA is synthesized during interphase. A single nucleus gives rise to two virtually identical daughter nuclei in mitosis. Spindle fibers are made of microtubules. Eukaryote chromosomes sometimes consist of a single chromatid.