In the context of mitosis, anaphase is the stage where the sister chromatids are pulled apart to opposite poles of the cell. Based on the information provided:
- You have 19 cells with 2 groups of chromatids in the process of separating. This indicates that these cells are likely in anaphase because the chromatids are being separated.
Thus, the number of cells in anaphase is 19.
So the correct response is 19.