<P> In interphase, the cell gets itself ready for mitosis or meiosis . Somatic cells, or normal diploid cells of the body, go through mitosis in order to reproduce themselves through cell division, whereas diploid germ cells (i.e., primary spermatocytes and primary oocytes) go through meiosis in order to create haploid gametes (i.e., sperm and ova) for the purpose of sexual reproduction . Chromosomes are copied . </P> <P> There are three stages of cellular interphase, with each phase ending when a cellular checkpoint checks the accuracy of the stage's completion before proceeding to the next . The stages of interphase are: </P> <Ul> <Li> G (Gap 1), in which the cell grows and functions normally . During this time, a high amount of protein synthesis occurs and the cell grows (to about double its original size)--more organelles are produced and the volume of the cytoplasm increases . If the cell is not to divide again, it will enter G . </Li> <Li> Synthesis (S), in which the cell duplicates its DNA (via semiconservative replication). </Li> <Li> G (Gap 2), in which the cell resumes its growth in preparation for division . The mitochondria divide and the cell continues to grow until mitosis begins . In plants, chloroplasts also divide during G2 . </Li> <Li> In addition, some cells that do not divide often or ever, enter a stage called G (Gap zero), which is either a stage separate from interphase or an extended G . </Li> </Ul> <Li> G (Gap 1), in which the cell grows and functions normally . During this time, a high amount of protein synthesis occurs and the cell grows (to about double its original size)--more organelles are produced and the volume of the cytoplasm increases . If the cell is not to divide again, it will enter G . </Li>

What are the three main things that happen during interphase
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