Cell Division: Mitosis

Objective: Understand the purpose of mitosis Understand the process of mitosis Explain the sequence and events of each phase

Review:

What are the two types of cells? Eukaryotic Prokaryotic

What are prokaryotic cells? Simple cells Few internal structures No membrane bound organelles One-celled organisms, Bacteria

Examples of prokaryotic cell: Bacteria Cells

What are eukaryotic cells? Cells that contain organelles surrounded by membranes Most living organisms

Examples of eukaryotic cells: Plant Cells Animal Cells Human Cells Human Cells

Plant Cell (Tomato) Animal Cell (tiger)

How do prokaryotic cells divide? Binary Fission (A fancy name that scientists use to impress their girlfriends or boyfriends. A process where one prokaryotic cell becomes two.)

How do eukaryotic cells divide? Mitosis!

Making more cells! What is mitosis? (How eukaryotic cells divide.) A continuous process of four phases that results in the division of the nucleus. Making more cells!

Why do we care? Once upon a time we were all one little cell. Because of mitosis we are now made of trillions of cells. This applies to animals too!

Made possible, in part by: MITOSIS

Made possible, in part by: MITOSIS

Made possible, in part by: MITOSIS

You get the idea…

The Phases of Mitosis

The 4 Phases of Mitosis: Prophase Metaphase Anaphase Telophase

What about Interphase? Interphase is the resting period between cell division.

Why do we study diagrams first? Easy to identify structures Clear Simple

Why do should we view microscopic images also? To see the real deal! To reveal greater complexities.

Interphase diagram microscopic image

Are the cells really pink and purple? Nope, they are stained so that we can see the organelles better.

Prophase diagram microscopic image

Metaphase diagram microscopic image

Anaphase diagram microscopic image

Telophase diagram microscopic image

They all look like blobs… how can we tell them apart?

What’s happening in each phase?