HeLa cells stained for DNA with the Blue Hoechst dye. The central and rightmost cell are in interphase, thus their entire nuclei are labeled. The left cell is in the process of nuclear division (mitosis) where separated chromosomes can be identified.

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HeLa cells stained for DNA with the Blue Hoechst dye. The central and rightmost cell are in interphase, thus their entire nuclei are labeled. The left cell is in the process of nuclear division (mitosis) where separated chromosomes can be identified.