Unit 2: From Cell to Organism
LEARNING TARGET 2: CELLS CYCLE AND REGULATION
Let's see what we know...
Watch the phases of mitosis in 3D with the sound off. Observe to see if you are able to identify and talk about what you are seeing. Try to use science vocabulary as we pause occasionally in between each step to discuss what we are looking at. |
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Now let's preview some key vocabulary...
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Here is a copy of the Notes pages. As we explore the cell cycles and regulation, please take notes to reference.
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lt_2_notes_cell_cycle_notes_2016.pptm | |
File Size: | 2823 kb |
File Type: | pptm |
Mitosis
Mitosis is the process of cell division, including separation and replication of the chromosomes, which results in two genetically identical daughter cells. In a stricter sense, mitosis is the distribution (separation) of the chromosomes and cell organelles to the two daughter cells. Mitosis is usually divided into six segments: prophase, prometaphase, metaphase, anaphase, telophase, and cytokinesis.
The Cell CycleLets break down what happens in each phase. On your own page identify and name each cycle. Follow the directions in color coding your Cell Cycle and completing the handout.
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Test yourself...
Click Here to test your knowledge on Chemgapedia's website, or Click Here for a The Cell Cycle & Mitosis Tutorial Quiz
Click Here to test your knowledge on Chemgapedia's website, or Click Here for a The Cell Cycle & Mitosis Tutorial Quiz
Onion Root Tip Lab
To study mitosis, biologists often look at particular cells. Remember, that mitosis occurs only in areas of growth, so finding a good spot to study it can be challenging. Two specimens are commonly used by biologists to study mitosis: the blastula of a whitefish and the root tip of an onion.
The whitefish embryo is a good place to look at mitosis because these cells are rapidly dividing as the fish embryo is growing. The onion root is also a good place because this is the area where the plant is growing. Remember that when cells divide, each new cell needs an exact copy of the DNA in the parent cell. This is why mitosis is only visible in cells that are dividing, like the whitefish embryo and the onion root tip.
Mitosis can take several hours to complete. Scientists will make slides of cells that should be undergoing mitosis in order to find a particular cell in any of the stages - prophase, metaphase, anaphase, telophase. Remember that most cells you see will be in interphase, that the cells "resting" state. Your task is to look at photographs of actual slides and identify the stages of mitosis. Answer the questions on each page in your lab notebook or print this handout and answer direction on it.
The whitefish embryo is a good place to look at mitosis because these cells are rapidly dividing as the fish embryo is growing. The onion root is also a good place because this is the area where the plant is growing. Remember that when cells divide, each new cell needs an exact copy of the DNA in the parent cell. This is why mitosis is only visible in cells that are dividing, like the whitefish embryo and the onion root tip.
Mitosis can take several hours to complete. Scientists will make slides of cells that should be undergoing mitosis in order to find a particular cell in any of the stages - prophase, metaphase, anaphase, telophase. Remember that most cells you see will be in interphase, that the cells "resting" state. Your task is to look at photographs of actual slides and identify the stages of mitosis. Answer the questions on each page in your lab notebook or print this handout and answer direction on it.
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This assignment will also be available in your Google Classroom to complete
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The Cell Cycle and Cancer
Complete the notes on Cell Regulation in your notes packet
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Read the article "Cancer: Out of Control Cells". Answer the attached comprehension questions. Turn in.
This will also be available in Google Classroom. |
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Review
Remember this video from the beginning of the Learning Target? Lets watch it again and see if when pausing between the stages we can not apply higher level vocabulary (key terms). |
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