Identify the stage of mitosis by inspecting the image and key changes listed.
- nucleolus and nuclear membrane disappears
- organelles disappear, chromosomes are formed
- centrioles organize to form spindle fibres.
Based on the image and the key changes described, this stage of mitosis is prophase.
Prophase is the first stage of cell division in both mitosis and meiosis. Beginning after interphase, DNA has already been replicated when the cell enters prophase. During prophase, the nucleolus and nuclear membrane disappear, organelles disappear, chromosomes condense and centrioles organize to form spindle fibres.