Doublo- stranded DNAchromatids Sister A line of mouse cells is grown for many generations in a medium with SN. Cells in Gi are then switched to a new medium that contains “N. Match the chromosomes in each cell to the stage of the cell cycle. The DNA that contains N is shown in dark blue, whereas the DNA that contains “N is shown in light blue. For simplicity, only one set of chromosomes is shown in the cells N DNA N DNA Centromere G1 before switch to WN G2 after switch to N Anaphase of mitosis after Continued ALI switch to “N