Summary Puppies increase in size as their cells grow and divide. Almost all cells complete a full cell cycle the includes
interphase and cell division. In interphase, cells serve their specialized functions, grow, and copy their genetic
material. Mitosis is the first stage of cell division, in which the copied chromosomes are separated into two new
nuclei. Then in cytokinesis the cell divides into two daughter cells. If no mutations or errors occur, the genetic
material in each daughter cell is identical to what was in the original cell.

Now that you have completed this lesson, you should be able to:
1. describe the stages of the cell cycle
2. use a model to illustrate the role of cellular division in the formation of new cells
3. describe the structure of a chromosome
4. follow chromosomes through the processes of mitosis and cytokinesis