Interphase is the process before mitosis in cell growth and division. During interphase, the cell goes through 3 different stages: G1, Synthsis, and G2. During G1, the cell grows, makes proteins and organelles. During Synthesis, the cell makes a second copy of its DNA. Without the 2nd DNA copy, 2 cells would not be able to form. During G2, the cell grows more, makes more proteins and organelles, and gets ready to divide. The cell must grow twice its original size so the two daughter cells that will be formed with be the two identical copies of the first (parent) cell. Hope this helps!