Wednesday, December 6, 2017

Mitosis Biology 12/7/17

A Note from Mrs. Ehler Biology  Taylorsville High School
Essential Question:
Mitosis WebQuest Module on CANVAS


To Do TODAY in BIOLOGY
 GIZMO Cell Division: Explore Learning
Introduction to Microscopes:  Observe onion root tips in Stereoscopes.  
Play/Observe various slides with phone microscope cameras. 
Image of the Day
Meiose: Diferente da mitose, que tem uma célula diploide (se divide em 2 formando outra cel. Diplóide), a meiose é um tipo de divisão celular em que uma célula diplóide produz quatro células haploides (tem só um cromossomo de cada núcleo) sendo isso tem uma divisão reducional. Um fato do caráter reducional da meiose é que, os cromossomos só se duplicam uma vez, durante a interfase – período que antecede tanto a mitose como a meiose. No início da interfase, os filamentos de cromatina não estão duplicados. Ainda nesta fase, ocorre a duplicação, ficando cada cromossomo com duas cromátides.
In the NEWS
         

Mitosis Webquest Process

: )~ Cell DivisionCell growth 'Anatomia Vegetal' by Frederik Elfving (1929)

Mitosis Biology jokes I CAN FINALLY UNDERSTAND.

Part 1 WATCH THIS CLIP

Part 1 Continued HHMI the Eukaryotic Cell Cycle (Links to an external site.)Links to an external site. link to Click and Learn (en Espanol aqui (Links to an external site.)Links to an external site.)

Complete CANVAS assignment Cornell Notes Part 1 complete by next class.  Questions, Notes, Summary.  

Part 2 RESEARCH MITOSIS Content Page Mitosis

http://plaza.ufl.edu/alallen/pgl/modules/rio/stingarees/module/controls.html

*See Resources Page 

Cornell Note Grading Rubric AVID Orginization strategy

Part 3  GROUP POSTER 8 Groups of 5  Group Activity

Mitosis Stop Motion animationView in a new window

AP Biology Lab Environmental Effects on Mitosis in Onion Root. 

Part 5 VIRTUAL LAB Mitosis Internet Lesson.pdfView in a new window

Virtual  (Links to an external site.)Links to an external site.LAB Mitosis in Real Cells (White Fish Blastula compare to Onion Root Tip)




 Part 6  RESEARCH Cancer: Out of Control Cells

Cells do not live forever, and they will reach a point where they will divide through mitosis, or die through a process called apoptosis. Cancer cells are the exception, these cells do not die and divide uncontrollably as they crowd out healthy, productive cells. Cancer can have many causes, but most are thought to be related to carcinogens in the environment. Carcinogens are chemicals that can damage DNA and interfere with a cell's normal cycle, thus disrupting the cells ability to control when and how often it divides.
While most cells do not live forever, cancer cells do continue to divide as long as they are provided with nutrients. Research has been conducted for many years on an immortal line of cells called HeLa cells, named after Henrietta Lacks, who was a female with cervical cancer. All HeLa cells are derived from the original sample taken from her when she was a patient in 1951; Henrietta Lacks died that same year.

How Cancer Works

Cancerous transformation results from changes of the DNA and the genes that control the cell cycle. Two types of genes normally control the cell cycle: proto-oncogenes, which start cell division and tumor-suppressorgenes which turn off cell division. These two genes work together, one turning on cell division when the body needs to repair or replace tissue, and the other turning off cell division when the repairs have been made. If the proto-oncogenes become mutated, they can become oncogenes, genes that lead to uncontrolled cell division. Mutations in the tumor-suppressor genes result in the cell not having the ability to turn off cell division. Oncology is a branch of medicine that deals specifically with cancer.

Cancer Cells

When a cell becomes cancerous, it develops traits that normal cells do not have. For instance, a cancer cell can have unusual number of chromosomes due to incomplete mitosis or cytokinesis. Cancer cells may be abnormally shaped or larger than normal cells. Cancer cells also can lose their attachment to nearby tissue and travel to other parts of the body, where they continue dividing and causing problems at other locations. Secondary growths of cancer at a distance from the primary site are referred to as metastasis. Once a cancer has metastasized, aggressive therapies may be needed to treat the disease. Cancer cells take essential nutrients from the blood to grow and divide and crowd out other cells that have important jobs. In the case of leukemia, white blood cells grow uncontrollably and crowd out the red blood cells, thus reducing an individual's ability to deliver nutrients to the body and affecting the blood's ability to clot and repair wounds.
1. Compare the role of tumor suppressor genes to proto-oncogenes.

2. What are HeLa cells and why are they important?

3. What is the relationship between carcinogens and mutations? How does this in turn affect the development of cancer?

4. Identify the parts on the picture at the top. [ DNA, Chromosome, Tumor Suppressor, Proto-Oncogene, Cell ]
5. In 1951, cells were taken from Henrietta Lacks and used for many years in research. Henrietta did not give permission for her cells to be used, the law did not require that. These cells have been used in over 60,000 research projects, but Henrietta's family has not received any compensation for contribution to the research. Do you think the law should be changed? Should people be compensated for donating their cells to science?
Go Beyond

Part 7 Cancer Research Paper  

This is an embedded Microsoft Office (Links to an external site.)Links to an external site. presentation, powered by Office Online (Links to an external site.)Links to an external site.
.One does not simply complete mitosis. Image from www.ihearthisto.comMitosis - the middle cell is going through anaphase, which is when the chromosomes go the poles of the cell. They are pulled there by the spindles.22 Tumblr Science Jokes That Will Make You Laugh And Groan
mitosis 3d animation |Phases of mitosis|cell division - YouTube
Stages of Mitosis, a promotional piece, begins with a fly-through of cells preparing to undergo mitosis (cell division). Upon entering a cell we are introduced to various organelles of the inner cell and the key events involved in mitosis. Cell division involves 7 key stages resulting in the splitting of the nucleus, and ultimately, cell division.
Animated cell division TED
Mitosis Animation
Cellular Mitosis by NinthTaboo
Human cells showing the stages of cell division
I really want one of these. It would make a great question to start class: "When do multiplication and division mean the same thing?"Mitosis in onion cells
Mitosis: The Amazing Cell Process that Uses Division to Multiply! (Updated)
Dividing cells. | 21 Jaw-Dropping Photographs Of Life, Magnified This is a pig cell dividing, near the end of anaphase. The chromosomes are stained in purple and the microtubules are in green. ~Bethany Lau
Anatomy of Plant Cells by Frederic Elfving 1929. depicts the different stages of cell reproduction.Dividing cells. | 21 Jaw-Dropping Photographs Of Life, Magnified This is a pig cell dividing, near the end of anaphase. The chromosomes are stained in purple and the microtubules are in green. ~Bethany Lau
The cell cycle: mitosis and meiosis. Great image!
onion root tip mitosis lab report
Awesome video of the miracle of mitosis => Polymerization Pulls (George von Dassow, University of Oregon) - YouTube
Rendering of mitosis. The process of mitosis is extremely precise; when it comes to manipulating DNA, cells verge on being obsessive and with good reason. Gaining or losing a chromosome during cell division can lead to cell death, developmental disorders, or cancer. (Credit: © nobeastsofierce / Fotolia)
Mitosis Series: Late telophase stage of human (HeLa) cell division.
Mitosis Dance- love it! might be a little too advanced for middle school, but if you stop to explain the parts of the video, I think it would work...
funny science memes - Bing Images
Mr. Andersen uses chromosome beads to simulate both mitosis and meiosis. A brief discussion of gamete formation is also included. Do you speak another langua...
Online Onion Root Tips

Mitosis humor. Hilarious! I love to set my desktop background as a meme of what we're studying. My students love Mrs. Campbell's science humor.

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