CYTOKINESIS 1 Each of the chromosomes in a human cell contains two sister chromatids by the end of this phase. S PHASE 2. Most cell growth occurs during this phase. 0, PHASE 3. Cells that will never replicate leave the cell cycle and enter this phase. G, PHASE 4. Two separate daughter cells are produced at the end of this phase. Recte

CYTOKINESIS 1 Each of the chromosomes in a human cell contains two sister chromatids by the end of this phase. S PHASE 2. Most cell growth occurs during this phase. 0, PHASE 3. Cells that will never replicate leave the cell cycle and enter this phase. G, PHASE 4. Two separate daughter cells are produced at the end of this phase. Recte

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter10: Cell Reproduction

Section: Chapter Questions

Problem 8RQ: S. Chromosomes are duplicated during what stage of the cell cycle? G1 phase S phase prophase...

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Figure 28.11 depicts the eukaryotic cell cycle. Many cell types â€œexitâ€� the cell cycle and donâ€™t divide for prolonged periods, a state termedG0; some, for example neurons, never divide again. a. In what stage of the cell cycle do you suppose a cell might be when it exits the cell cycle and enters G0? b. The cell cycle is controlled by checkpoints, cyclins, and CDKs. Describe how biochemical events involving cyclins and CDKs might control passage of a dividing cell through the cell cycle.
If the M checkpoint is not cleared, what stage of mitosis will be blocked? prophase prometaphase metaphase anaphase
Unpacking of chromosomes and the formation of a new nuclear envelope is a characteristic of which stage of mitosis? prometaphase metaphase anaphase telophase
Neurons are arrested in ________ of the cell cycle. a. G1 b. anaphase c. prophase d. S phase
S. Chromosomes are duplicated during what stage of the cell cycle? G1 phase S phase prophase prometaphase
Anaphase 26. Identify the stages of mitosis in the pictures: prophase Metaphase 27. What type of cell is pictured: Plant or animal? animal 28. What happens if mitosis is not controlled? Cancer Cancer Telophase 2 5 Cytokinesis 29. Describe how checkpoints control the cell cycle. What normally happens to a cell if the cell does not pass a normal cell cycle control? 30. Describe 3 types of genes, if mutated, result in cancer. proto-oncogenes tumor suppressor genes cell fate gener 31. Describe how cancer cells differ from normal cells. bellen beng 32. Describe various causes of cancer. Carcinogens - occelerates cell division ②Mutagens - domage DNA ③Age- 33. Describe various treatments for cancer. Also list possible side effects. Chemotherapy Surgery Radiation 34. What is a mitotic index? What does it measure? mitotic indey to diagnise Hairloss concer and grade tumors 35. Predicting what the mitotic index would be for these cells: a. cardiac (heart) cells low high b. cells of root tips low…
Which phase is described below? The chromosomes condense, Each is made of two sister chromatids,(looks) like an "X" Each sister is a clone, the closest of kin, And acentromere connects them like siamese twinsThe nucleolus disappears it melts away, as the cell takes a ribosomeproduction holiday, the centrosomes separate, start spindle formationfor separating chromatids and cell elongation.
MITOTIC In the cell cycle it is necessary for interphase to happen before mitosis and cytokinesis creates 2 identical cells. Why is interphase neccessary? What is 1 major reason that mitosis wouldn't work without interphase happening first? INTERPHASE G, (DNA synthesis) Cytokinesis PHASE (M) G, Ce t (level 1) tv MacBook Air DII 80 FS F4 & 23 $ 9. 7 8 3 4 Y W E J K F C V command option nd ...-
TELOPHASE This stage shows the end of Telophase AFTER cytokinesis has occurred • Nuclear membrane reformed in each cell • Nucleolus reformed in each cell • Centrioles present in cells at one end Two new daughter cells with same # of chromosomes: 46 single stranded chromosomes in each nucleus Daughter Cell Diploid cell 2n = Daughter cell Diploid cell 2n =
Ith the description: Homologous chromosomes line up in pairs along the metaphase plate. 1. Telophase II followed by cytokinesis Crossing over occurs between homologous chromosomes. 2. Metaphase I 3. Anaphase I| Four haploid, genetically unique cells are formed. 4. Prophase I Homologous chromosomes are separated. 5. Anaphase I Sister chromatids are separated. >
of my celle chose are wels smaller than normal. According to Model 1, what part(e) of the cell cycle is (ere) ou likely being affected? Some cancerus me 7. In Model 1, if the length of the arrow represents time, then for those cancerous cells, what hap pens to the time that is necessary for the cell cycle? What implication might this have for doctors who are treating cancer patients? Why? Living things must grow and develop. At times they suffer injuries or damage, or cells simply wear out. New cells must be formed for the organism to survive. What process must occur to make a new, properly- functioning cell? Model 1 - Mitosis as Part of the Cell Cycle Prophase Metaphase Anaphase Mitosis How do living things grow and repair themselves! Replicated chromosome (2 sister chromatids) 0000 * Centriole Spindle fibers Nuclear membrane Telophase 1. Refer to Model 1. List the four phases in the mitosis process. 2. Where is mitosis in the cell cycle? Before 3. What three phases of the cell cycle…
15. A cell is considered to be differentiated when it_. (LS1-4) * replicates by the process of mitosis loses connections to the surrounding cells appears to be different from the surrounding cells produces proteins specific to a particular cell type