The image below shows a somatic cell from an organism for which 2n = 4 (the cellfrom the image below). Which of the cells beneath it (cells A, B, C or D) could be agamete from this organism? Explain why you chose the cell you did discussing thechanges in chromosome number nd DNA content of a cell throughout the cell cycle.You should also explain if any of the other images could represent a cell from thisorganism in stages of meiosis or mitosis or other stages of the cell cycle.XXxC"₁XXBXXX X

The process of mitosis occurs in somatic cell so it is known as somatic cell division. In mitotic…

from the image below). Which of the cells beneath it (cells A, B, C or D) could be a cell from an organism for which 2n = 4 (the cell gamete from this organism? Explain why you chose the cell you did discussing the changes in chromosome number and DNA content of a cell throughout the cell cycle. You should also explain if any of the other images could represent a cell from this organism in stages of meiosis or mitosis or other stages of the cell cycle. X X OC XX X X

from the image below). Which of the cells beneath it (cells A, B, C or D) could be a cell from an organism for which 2n = 4 (the cell gamete from this organism? Explain why you chose the cell you did discussing the changes in chromosome number and DNA content of a cell throughout the cell cycle. You should also explain if any of the other images could represent a cell from this organism in stages of meiosis or mitosis or other stages of the cell cycle. X X OC XX X X

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter28: Dna Metabolism: Replication, Recombination, And Repair

Section: Chapter Questions

Problem 19P: Figure 28.11 depicts the eukaryotic cell cycle. Many cell types â€œexitâ€� the cell cycle and...

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Biologists have long been interested in the effects of radiation on cells. In one experiment, researchers examined the effect of radium on mitosis of chick embryo cells growing in culture. A population of experimental cells was examined under the microscope for the number of cells in telophase (as a measure of mitosis occurring) before, during, and after exposure to radium. The results are shown in the Figure. What is the effect of radium exposure on mitosis? Source: R. G. Canti and M. Donaldson. 1926. The effect of radium on mitosis in vitro. Proceedings of the Royal Society of London, Series B, Containing Papers of a Biological Character 100:413419.
When studying living cells in a laboratory, researchers sometimesuse drugs as a way to make cells remain at a particular stage of thecell cycle. For example, aphidicolin is an antibiotic that inhibitsDNA synthesis in eukaryotic cells and causes them to remain inthe G1 phase because they cannot replicate their DNA. In whatphase of the cell cycle—G1, S, G2, prophase, metaphase, anaphase,or telophase—would you expect somatic cells to stay if they weretreated with each of the following types of drug?A. A drug that inhibits microtubule formationB. A drug that allows microtubules to form but prevents them fromshorteningC. A drug that inhibits cytokinesisD. A drug that prevents chromosomal condensation
When studying living cells in a laboratory, researchers sometimesuse drugs as a way to cause cells to remain in a particular phaseof the cell cycle. For example, aphidicolin inhibits DNA synthesisin eukaryotic cells and causes them to remain in the G1 phasebecause they cannot replicate their DNA. In what phase of thecell cycle—G1, S, G2, prophase, metaphase, anaphase, or telophase—would you expect somatic cells to stay if the followingtypes of drug were added?A. A drug that inhibits microtubule formationB. A drug that allows microtubules to form but prevents themfrom shorteningC. A drug that inhibits cytokinesisD. A drug that prevents chromosomal condensation
What is the major difference between M phase and interphase of the cell cycle? We can see activity within the cell only during M phase. Interphase is when the cell divides, whereas M phase is where it is mute. We can see activity within the cell only during interphase. M phase involves color changes, which is why there are chromosomes.
How long does it take for a cell to take one complete cycle? The answer varies on the type of cell and the species. For instance, a liver cell completes its cell cycle for over 22 hours (Becker and Lane 1965) while other somatic cell lasts to about 18 hours. Can you cite other types of cells that undergo cell cycle and the time it takes to complete the cycle? List five below.
Which stage of the cell cycle is the longest? Why are onion root tips a good choice for viewing cells in different stages of the cell cycle? Are there any mammalian cells that would be a good source for dividing cells? What types of cells would most like NOT have cells undergoing division?
Draw a diagram of the cell cycle and label the phases. On your diagram: for each phase indicate whether the chromosomes are condensed or not, indicate the phase(s) when it is possible to do a karyotype indicate the phase-transition(s) where the cell would arrest if you added hydroxyurea
The following diagram shows a simulated microscopic view of a tissue sample taken from a patient where the cells have been squashed onto a slide and stained to visualize the cell's DNA. In the diagram, click or tap on the center of all cells that appear to be involved in any of the four stages of mitosis. Make sure to mark as close to the center of the cell as possible. In the diagram from Question 5, count the total number of cells visible and write the total number of cells in the space below: In the diagram from Question 5, count the number of cells that you had marked as currently undergoing any of the four phases of mitosis. How many cells in total are currently undergoing mitosis? Write this number in the space below: The mitotic index is a calculated value that represents the percentage of cells in a sample that are actively dividing. It involves counting the total number of cells present including those actively dividing or those in interphase, the total number of cells that…
a micrograph of chromosomes from a normalhuman cell. If you created this kind of image using a cell from aperson with Down syndrome, what would you expect to see?
YOU DON'T NEED TO EXPLAIN THESE QUESTIONS JUST PROVIDE ANSWER DNA separates during ____ of mitosis. a)Prophase b)Telophase c)Metaphase d)Interphase e)Anaphase 2. What separates during mitosis? a)Single DNA strands b)Cytoplasm c)Sister chromatids d)Telomeres e)Homologous chromosomes 3. Oncogenes are associated with cancer because they Oncogenes are associated with cancer because they (select one answer) Cause cells to initiate a death pathway Fail to put a “brake” on the cell cycle Push cells through the cell cycle Divert cells into G0 phase Slow down the cell cycle
A somatic cell has 46 chromosomes aligned at metaphase. How many chromosomes are present at anaphase, immediately after the centromeres have split?
The cell cycle of an average mammalian cell is illustrated below. How long did it take for the above-illustrated mammalian cell to complete one cell cycle?How long did the mitosis/cytokinesis phase (M phase) last? What % of the total cell-cycle timedoes that constitute to? What phase takes the longest time to complete during cell cycle and what % of the total cellcycle time does that constitute to? Explain why you think this might be the longest phase of thecell cycle.How long was the S phase? What is happening in the cell during the S phase?