During the first gap phase, G 1, cells have only the chromosome they were given at the previous cell division each decondensed chromosome is a single DNA duplex. ( B) Chromosome behavior during the cell cycle. In tissues, cells can continue further rounds of division or can exit the cell cycle. In mitosis (M), cell parts are reorganized so the mitotic spindle can achieve the equipartition of the chromosomes and centrosomes, leaving the distribution of more numerous components, such as ribosomes, to the laws relating to large numbers and the process of cytokinesis (C), in which the cell itself divides into two daughters. During interphase (G 1, S, G 2), the cell accomplishes sufficient biosynthesis to become two. ( A) Cartoon of the main segments of the cell cycle.
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