Cell Theory & Cell Division

1. All living things are made of cells Cell Theory 1. All living things are made of cells

Which of the following is made of cells? Rock Bacteria Fish Skin Glass Eyelashes Question 2: Which of these are made of atoms?

(they contain different parts with their own jobs) Cell Theory 2. Cells have structure (they contain different parts with their own jobs)

3. All cells come from other cells Cell Theory 3. All cells come from other cells

4. Cells contain DNA or genetic information Cell Theory 4. Cells contain DNA or genetic information

2 Types of Cells 1. Eukaryotic = Has a Nucleus 2. Prokaryotic = Has NO Membrane Bound Nucleus

To help you remember… Pro = NO! Eu = YES!

How do Cells Divide?

Mitosis Videos Cell Cycle & Cancer Mitosis As you watch: Why is it important for your cells to divide? What are the 4 main parts of Mitosis?

Why is it important for cells to divide? Helps you grow Helps heal wounds Replaces old, worn out cells

Before a cell divides… Interphase 90% of cell life Cell is working, doing its job Towards the end, begins to make a copy of its DNA

Steps of Mitosis: PMAT 1. Prophase P = Prepare Cell makes a copy of DNA DNA condenses into chromosomes

Steps of Mitosis: PMAT 2. Metaphase M = Middle Nucleus “dissolves” Chromosomes line up in the middle of the cell

Steps of Mitosis: PMAT 3. Anaphase A = Away Chromosomes are pulled apart

Steps of Mitosis: PMAT 4. Telophase T = Two Twins Splits into two identical nuclei and cells

Identify the Steps of Mitosis A) B) Identify the Steps of Mitosis C) D)

B A D C

Meiosis- division of sex cells It is what makes you male or female PMAT x 2 then cytokenesis

Steps of Meiosis