Campbell Biology In Focus
2nd Edition
ISBN: 9780134203072
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 9, Problem 9TYU
FOCUS ON EVOLUTION
The result of mitosis is that the daughter cells end up with the same number of chromosomes that the parent cell had. Another way to maintain the number of chromosomes would be to carry out cell division first and then duplicate the chromosomes in each daughter cell. Assess whether this would be an equally good way of organizing the cell cycle. Explain why evolution has not led to this alternative.
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Chapter 9 Solutions
Campbell Biology In Focus
Ch. 9.1 - WHAT IF? A chicken has 78 chromosomes in its...Ch. 9.2 - Compare cytokinesis in animal cells and plant...Ch. 9.2 - Prob. 3CCCh. 9.2 - Compare the roles of tubulin and actin during...Ch. 9.3 - Prob. 1CCCh. 9.3 - Prob. 2CCCh. 9.3 - Compare and contrast a benign tumor and a...Ch. 9.3 - Prob. 4CCCh. 9 - Through a microscope, you can see a cell plate...Ch. 9 - In the cells of some organisms, mitosis occurs...
Ch. 9 - Which of the following does not occur during...Ch. 9 - Prob. 4TYUCh. 9 - The drug cytochalasin B blocks the function of...Ch. 9 - DRAW IT Draw one eukaryotic chromosome as it would...Ch. 9 - The light micrograph shows dividing cells near the...Ch. 9 - SCIENTIFIC INQUIRY Although both ends of a...Ch. 9 - FOCUS ON EVOLUTION The result of mitosis is that...Ch. 9 - SYNTHESIZE YOUR KNOWLEDGE Shown here are two He La...Ch. 9 - FOCUS ON INFORMATION The continuity of life is...
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- The individual chromosomes become visible with a light microscope during which stage of mitosis? a. prophase b. prometaphase c. metaphase d. anaphasearrow_forwardIn the cell cycle, at which stages do two chromatids make up one chromosome? a. beginning of mitosis b. end of G1 c. beginning of S d. end of mitosis e. beginning of G2arrow_forwardAfter mitosis, each daughter cell contains genetic instructions that are ______ and _____ chromosome number of the parent cell. a. identical to the parent cells; the same b. identical to the parent cells; one-half the c. rearranged; the same d. rearranged; one-half thearrow_forward
- Chromosomes are duplicated during what portion of the cell cycle? a. G 1 phase b. S phase c. prophase d. prometaphasearrow_forwardWhat is true of mitosis?1. A cell undergoes two cell divisions.2 .The daughter cells produced are gametes.3.Hofblogous chromosomes are separated to produce four haploid daughter cells.4. Sister chromatids separate to produce two diploid daughter dells.arrow_forwardWhich statement is true regarding mitosis?1.During prophase, the chromosomes become uncondensed and two new nuclei are formed.2.During telophase, the chromosomes align in the center of the cell.3.During metaphase, the chromosomes condense4.During anaphase, the chromatids separate and move to opposite poles.arrow_forward
- The image below is of a stained onion root tip. Determine the phase of mitosis that each cell below is in, and record that below. Look closely - cells that are clearly stained are numbered in the image below. Use those numbers when assigning the phase of mitosis for each cell. Using the same onion root tip image and data from the question above, which phase are the majority of cells in? Make a conclusion about what this means about the length of each phase of the cell cycle.arrow_forwardThe diagram shows a cell that has completed mitosis and cytokinesis. Which stage of the cell cycle will both daughter cells now enter? O Meiosis Interphase O Cytokinesis The cell does not enter into a new cell cyclearrow_forwardWhat is the specific structure of DNA during both the prophase and metaphase stages of mitosis?1.Condensed chromosomes2.Unreplicated chromosomes3.Single chromatid4.Separated chromatidsarrow_forward
- Speculate about the following details of mitosis. 1. Why do chromosomes need to condense during mitosis? 2. Why does the nuclear membrane need to break down at the beginning of prometaphase? 3. Why do chromosomes congress (migrate) toward the metaphase plate during metaphase, and what forces keep the chromosomes there until anaphase begins? 4. What would happen if one kinetochore of one chromosome failed to attach to the spindle and the cell entered anaphase? In a general sense, how do cells normally prevent this situation? 5. During late anaphase and telophase, animal cells elongate to aid the eventual separation of the two daughter cells in cytokinesis. This elongation can occur even in cell suspensions, where different cells do not come into contact. Are the forces that elongate the cell likely to be pushing forces or pulling forces, and where do these forces come from?arrow_forwardFigure 6.4 Which of the following is the correct order of events in mitosis?a. Sister chromatids line up at the metaphase plate. The kinetochore becomes attached to the mitotic spindle. The nucleus re-forms and the cell divides. The sister chromatids separate.b. The kinetochore becomes attached to the mitotic spindle. The sister chromatids separate. Sister chromatids line up at the metaphase plate. The nucleus re-forms and the cell divides.c. The kinetochore becomes attached to metaphase plate. Sister chromatids line up at the metaphase plate. The kinetochore breaks down and the sister chromatids separate. The nucleus re-forms and the cell divides.d. The kinetochore becomes attached to the mitotic spindle. Sister chromatids line up at the metaphase plate. The kinetochore breaks apart and the sister chromatids separate. The nucleus re-forms and the cell divides.arrow_forwardIn your own words, briefly explain the different phases of the cell cycle. Explain what events take place at each phasearrow_forward
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The Cell Cycle and its Regulation; Author: Professor Dave Explains;https://www.youtube.com/watch?v=eqJqhA8HSJ0;License: Standard YouTube License, CC-BY
Cell Division - Mitosis and Meiosis - GCSE Biology (9-1); Author: Mr Exham Biology;https://www.youtube.com/watch?v=w7vp_uRA8kw;License: Standard YouTube License, CC-BY