1. Lesson 44 Cell Cycle

2. Activator Has your body changed in the past six months?
How did you recognize this change?
Are you taller? Did your hair grow? Did you clip your toenails?
Has anyone broken a bone recently?
How does your body repair itself?
Explain your answers

3. The Cell Cycle How do we grow? Our cells divide over and over again
During the cell cycle, a cell grows, prepares for division, and divides into two new cells
These new cells are called daughter cells
Process begins again

4. Three Main Stages in Cell Division
Stage 1: Interphase
Stage 2: mitosis
Stage 3: Cytokinesis
Looking at the diagram-what stage does a cell
spend most of it’s life?

5. First Stage: Interphase
Period before cell division
Cell growth
Makes a copy of it’s DNA
And prepares to divide into two cells

6. First Stage: Interphase
Growing
Grows to full size
Makes new ribosomes and produces enzymes
Copies are made of mitochondria and chloroplast
Copying DNA
DNA replication
23 chromosomes  46 Chromosomes
Preparing for Division
Creates centrioles (structure that pulls apart chromosomes)

7. Cell Cycle Video https://www.youtube.com/watch?v=WaJ8epyEx2Q
Brain Break Video
People are Awesome

8. Classwork Complete the reading and comprehension questions
Work independently for 10 minutes
Try your best
Review with a partner for 5 minutes
Review as a class