Mitosis part of cell cycle has 5 phases, prophase, prometaphase, metaphase, anaphase, and telophase.

This image shows the first two phases of mitosis,  prophase, and prometaphase. In the prophase part of mitosis, the parent cell chromosomes — which were duplicated during S phase — condense and become thousands of times more compact than they were during interphase.

 

In the prometaphase which occurs right after the prophase phase, phosphorylation of nuclear lamins by M-CDK causes the nuclear membrane to break down into numerous small vesicles. As a result, the spindle microtubules now have direct access to the genetic material of the cell.

 

In these third and fourth stages of mitosis, each set of chromosomes moves toward the opposite end of the cell, then when the spindle fibers disappear, the nuclear membrane appears and the cell divides into two daughter cells

 

In the last stage of mitosis the sister chromatids reach opposite poles. The small nuclear vesicles in the cell begin to re-form around the group of chromosomes at each end.

 

I chose this for my biology unit because i found in the most important to understand plant and animal lives.