Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth...
-
Upload
collin-mccarthy -
Category
Documents
-
view
214 -
download
0
Transcript of Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth...
![Page 1: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/1.jpg)
MitosisCh. 9.1-9.3
![Page 2: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/2.jpg)
Objectives
1. Describe how cell reproduction contributes to repair and growth
2. Structure of a chromosome
3. Explain cell cycle
4. Understand mitosis and cytokinesis
5. Basics of cancer
![Page 3: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/3.jpg)
Two Functions of Cells1. Repair
2. Growth• The outer layer of
skin on your arm consists of dead cell.
– Constantly replacing each other!
• Cells also key in reproduction . . . more on that later
![Page 4: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/4.jpg)
An idea of where we’re at
![Page 5: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/5.jpg)
The DNA• Genetic material
located in nucleus of cell
• Most of the time it exists as chromatin
• Chromatin:– Uncoiled DNA, not
visible
![Page 6: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/6.jpg)
ChromosomesHome of the DNA
• Cell prepares to divide• Chromatin fibers
condense and become…• Chromosomes:
– Condensed, visible threads of genetic material
• Yarn example• Humans have 46
chromosomes
![Page 7: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/7.jpg)
ChromosomesHome of the DNA
• Right before division, the cell duplicates all of it’s chromosomes
• Sister Chromatids:– Identical, joined copies
of chromosomes
• Centromere:– Joining region of
chromatids
![Page 8: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/8.jpg)
![Page 9: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/9.jpg)
Check Your Neighbor
• Quiz your neighbor on the terms we just learned.
![Page 10: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/10.jpg)
The Cell Cycle
Let's Look at 3 examples of cell division (9.1 activity)
![Page 11: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/11.jpg)
The Cell Cycle• All cells divide at
different rates• Interphase:
– 90% of cycle
• Three stages during interphase:
– G1
– Synthesis
– G2
• Miotic Stage (10%)
![Page 12: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/12.jpg)
Cell CycleStages of Interphase
• G1:– Cell grows
• Synthesis:– DNA duplicates
• G2:– Cell prepares to divide
• Cell Cycle Animation and Different Types of Cells That Divide (9.2)
![Page 13: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/13.jpg)
Cell Cycle Video Clip
![Page 14: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/14.jpg)
Check Your Neighbor
• Quiz your neighbor on the cell cycle….
![Page 15: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/15.jpg)
![Page 16: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/16.jpg)
Mitosis• Mitosis:
– Non-sexual means of cellular reproduction
• Four Stages:1. Prophase2. Metaphase3. Anaphase4. Telophase• Cytokinesis
• Let’s use pipe cleaners to demonstrate the stages of mitosis. Draw them out after you make them.
![Page 17: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/17.jpg)
MitosisProphase
• Nuclear envelope dissolves• Spindle forms• Chromosomes visible
![Page 18: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/18.jpg)
MitosisMetaphase
• Chromosomes line up along equator• Spindles attach
![Page 19: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/19.jpg)
MitosisAnaphase
• Chromatids separate• Pulled towards opposite ends of cell by spindles
![Page 20: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/20.jpg)
MitosisTelophase
• Chromatids uncoil• Nuclear envelope re-forms
![Page 21: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/21.jpg)
Cytokenesis• Division of cytoplasm• Two identical daughter cells• Mitosis: Let's watch the real thing!
![Page 22: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/22.jpg)
Hand JiveProphase Metaphase
Anaphase Telophase
![Page 23: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/23.jpg)
Mitosis Quiz
• When I pause the movie, you tell me what stage of Mitosis we are in.
![Page 24: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/24.jpg)
Cancer• Family or friends with cancer?• Cancer:
– Uncontrollable cell division– Faulty checkpoints
• Out of control cell reproduction produces tumors
• Benign tumor: – Abnormal mass of normal cells
• Malignant tumor:– Mass of cancer cells
• Metastasis:– Spreading of cancer cells
Activity 9.4
More cancer animation
![Page 25: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/25.jpg)
How a tumor is formed
![Page 26: Mitosis Ch. 9.1-9.3. Objectives 1.Describe how cell reproduction contributes to repair and growth 2.Structure of a chromosome 3.Explain cell cycle 4.Understand.](https://reader035.fdocuments.in/reader035/viewer/2022062519/5697c01c1a28abf838ccffae/html5/thumbnails/26.jpg)
Proto-oncogenes encourage cell division