Input (grade 8): For example, each human cell has about 1.8 meters of DNA, but wound on the histones it has about 90 millimeters (?) of chromatin, which, when duplicated and condensed during mitosis, result in about 120 micrometers of chromosomes.
Output (grade 10): For example, each human cell has about 1.8 meters of DNA, but wound on the histones it has about 90 millimeters of chromatin, which, when duplicated and condensed during mitosis, result in about 120 micrometers of chromosomes.