This half of the screen illustrates mitosis—the division of a cell's nucleus ... cells is identical. A human cell contains 46 chromosomes. To simplify our illustration, we'll show only four.

Visualization of the genome (green) and a single gene (magenta) in a human cell nucleus, with genomic motions mapped by arrows and an example of a gene trajectory highlighted as a colored curve.

Chances are you've seen an illustration of ... which contain no nucleus and no nuclear DNA, every one of these cells contains the human genome -- a string of three billion A's, C's, G's, and ...

including a human cell (nucleus, arrow). Fluorescence microphotograph in the UV light, specimen prepared with a fluorescence dye that binds to DNA (DAPI). Nuclei of cells and bacteria, Riesia ...