Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Extracellular matrix wikipedia , lookup
Tissue engineering wikipedia , lookup
Cell encapsulation wikipedia , lookup
Cell culture wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Cellular differentiation wikipedia , lookup
Cytokinesis wikipedia , lookup
Biochemical switches in the cell cycle wikipedia , lookup
Cell growth wikipedia , lookup
Name__________________________ Date ___________________________ Mitosis and Cell Cycle Web Quest Follow the website links provided in order to answer the following questions “Cells Alive” Mitosis Tutorial http://www.cellsalive.com/mitosis.htm Click the mitosis link on the left side of the screen. Read the text below the step by step animation and also view the animation. You can slow down the animation by clicking step by step through the phases. 1) List the stages of mitosis in order. Notice that there is an extra phase here called “prometaphase” which is an in-between phase between prophase and metaphase. You are not responsible for this phase in our class. 2) In which phase of mitosis does each of the following occur: Chromatin condenses into chromosomes _________________________________________ Chromosomes align in the center of the cell_______________________________________ The longest portion of a cell’s life cycle ___________________________________________ Nuclear envelope breaks down. ________________________________________________ Cell is cleaved into two new daughter cells _______________________________________ Daughter chromosomes arrive at the poles _______________________________________ 3) After watching the video, why were there two chromatids of each color? (What process occurred to each chromosome PRIOR to mitosis?) 4) How many chromosomes are present at the beginning of this mitosis cycle?___________ 5) How many chromosomes are in each cell at the END of this mitosis cycle?___________ 6) What are the green cylinders located in the cell during the animation? ___________________ 7) What do these structures do during the process of mitosis? 8) Identify the stages of these cells: 9) Go to the following website: http://plaza.ufl.edu/alallen/pgl/modules/rio/stingarees/module/what.html What are two different reasons that cells go through cell division as indicated by the website? 10) Using the same website, indicate and DESCRIBE one of the main controls that cells use to control cell division. 11) What is the function of microtubules in mitosis? Onion Root Tip Lab Simulation http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/cell_cycle.html Read the introduction and then click the “next” button. Check out and read the information about the different phases & click “next” Read the assignment and then click next. Classify each of the 36 cells into the correct phase. When finished, record the number of cells in each phase in the table provided. Interphase Prophase Metaphase Number of Cells Percent of Cells Anaphase Telophase Total 36 100% 12) What stage were a majority of the cells in? 13) What evidence from this lab shows that mitosis is a continuous process and not a series of separate events that happen all over the organism at the exact same time? 14) If this onion cell started has 24 chromosomes in one of its diploid cells, how many would we expect to find in an onion’s gametes? 15) In allium, a flowering plant, interphase lasts about 15 hours and mitosis takes around 80 minutes. Assuming that each stage of mitosis takes the same amount of time, how many hours old is a cell that is at the beginning of anaphase? Cancer Cells http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/Bio%20101/Bio%20101%20Lectures/Can cer/cancer.htm 16) What is cancer according to this website? 17) Describe three different characteristics of cancer cells. 18) What types of cancers are associated with alcohol? 19) What is a tumor? The Use and Controversy of Stem Cells: using the tutorials, answer the following questions http://learn.genetics.utah.edu/content/stemcells/ 20) What is a differentiated cell? 21) What is a stem cell? 22) According to United States law, where can scientists obtain stem cells for research? 23) List three difficult questions that have been raised due to stem cell research.