Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 9.5, Problem 1CSC
Body, Heal Thyself
The precision of mitotic cell division is essential for repairing damaged tissues like those in Bartolo Colón’s pitching arm. Imagine what might happen if DNA synthesis during interphase did not copy all of the genes accurately, or if mitotic cell division sent random numbers and types of chromosomes into the daughter cells. Some of the daughter cells might not contain all the genes needed to form the cell types that are required to repair damaged tissues. Other daughter cells might have genetic changes that stimulate unrestrained cell division and cause cancer. In cancer cells, the cell cycle spins out of control, but under normal circumstances cell division is precisely regulated. How does the body usually control the cell cycle?
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Mitosis DrawingIn this assignment you will track and draw the chromosomes of a diploid organism through all the stages of mitosis. Make sure to draw the alleles for genes A and B on the chromatids in every stage. For mitosis, remember that many events are going on in the cell that are relevant besides just the movement of chromosomes, so please fill in the cell with pertinent structures such as centrioles and spindles.
In the tracking chromosomal DNA movement through mitosis experiment, how many chromosomes did each of your daughter cells contain? Why is it important for each daughter cell to contain information identical to the parent cell? How often do human skin cells divide? Why might that be? Compare this rate to how frequently human neurons divide. What do you notice?
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→ loss of function of cdc25
Chapter 9 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 9.1 - describe the types of cells found in a...Ch. 9.1 - describe the functions of cell division in...Ch. 9.2 - describe the prokaryotic cell cycle and the major...Ch. 9.3 - describe the structure of a eukaryotic chromosome?Ch. 9.3 - describe the functions of telomeres and...Ch. 9.4 - Body, Heal Thyself Ligaments and tendons have a...Ch. 9.4 - describe the events of the eukaryotic cell cycle?Ch. 9.4 - explain the difference between mitotic cell...Ch. 9.5 - Body, Heal Thyself The precision of mitotic cell...Ch. 9.5 - describe the steps of mitotic cell division?
Ch. 9.5 - What would the consequences be if one set of...Ch. 9.5 - describe the usual outcome of mitotic cell...Ch. 9.5 - Prob. 3CYLCh. 9.6 - Body, Heal Thyself Bartolo Colns physicians wanted...Ch. 9.6 - Prob. 1CTCh. 9.6 - describe the interactions among growth factors,...Ch. 9.6 - Yesterday, when Daniel was showering after a...Ch. 9.6 - The saliva of dogs, like the saliva of most...Ch. 9.6 - What would happen if a cell suffered a mutation...Ch. 9.6 - explain how a cell protects against producing...Ch. 9 - Most nerve cells in the adult human central...Ch. 9 - The genetic material of all living organisms is...Ch. 9 - A cell that remains capable of dividing throughout...Ch. 9 - Diagram and describe the eukaryotic cell cycle....Ch. 9 - Prob. 2ACCh. 9 - Prokaryotic cells divide by a process called...Ch. 9 - Prob. 2MCCh. 9 - Prob. 2RQCh. 9 - Prob. 3FIBCh. 9 - Prob. 3MCCh. 9 - Prob. 3RQCh. 9 - Prob. 4FIBCh. 9 - How does prokaryotic fission differ from...Ch. 9 - Define the following terms: centromere, telomere,...Ch. 9 - The four phases of mitosis are _________,...Ch. 9 - Prob. 5MCCh. 9 - Prob. 5RQCh. 9 - Prob. 6FIBCh. 9 - Prob. 6RQCh. 9 - Prob. 7RQ
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- Figure 10.6 Which of the following is the correct order of events in mitosis? Sister chromatids line up at the metaphase plate. The kinetochore becomes attached to the mitotic spindle. The nucleus reforms and the cell divides. Cohesin proteins break down and the sister chromatids separate. The kinetochore becomes attached to the mitotic spindle. Cohesin proteins break down and the sister chromatids separate. Sister chromatids line up at the metaphase plate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the cohesin proteins. Sister chromatids line up at the metaphase plate. The kinetochore breaks down and the sister chromatids separate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the mitotic spindle. Sister chromatids line up at the metaphase plate. Cohesin proteins break down and the sister chromatids separate. The nucleus reforms and the cell divides.arrow_forwardFigure 10.13 Rb and other proteins that negatively regulate the cell cycle are sometimes called tumor suppressors. Why do you think the name tumor suppressor might be appropriate for these proteins?arrow_forwardThe mitotic spindles arise from which cell structure? centromere centroscme kinetochore cleavage furrowarrow_forward
- After 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_forwardIdentical copies of chromatin held together by cohesin at the centromere are called.______ histones nucleosomes chromatin sister chromatids.arrow_forwardWhich of the following events does not occur during some stages of interphase? DNA duplication organelle duplication increase in cell size separation of sister chromatidsarrow_forward
- S. Chromosomes are duplicated during what stage of the cell cycle? G1 phase S phase prophase prometaphasearrow_forwardNormal events in mitosis gives rise to daughter cells with exactly the same chromosome number and genetic material. What may be expected to happen chromosomally and genetically to: an unfertilized egg that undergoes mitosis, but fails to undergo cytokinesis? a cell with a chromosome that lost its centromere? a cell with a chromosome that contains two centromeres?arrow_forwardWhich 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?arrow_forward
- Normal events in mitosis gives rise to daughter cells with exactly the same chromosome number and genetic material. What may be expected to happen chromosomally and genetically to: an unfertilized egg that undergoes mitosis, but fails to undergo cytokinesis? 2. a cell with a chromosome that lost its centromere?arrow_forwardQ1: Prior to going through meiosis, the nucleus would look like which letter? (Write just the letter below.) Q2: Next, the mitotic spindle fibers start to organize into centrosomes and these centrosomes pull away from each other, but since these images just show the nucleus, you don't see that here. While the mitotic spindle fibers are reorganizing, the DNA chromosomes start to condense, which you do see here. This is represented by what image? Q3: Once the DNA is completely condensed and organized into chromosomes, homologous chromosomes pair up in a process known as synapsis. This is represented by what image? Q4: Synapsis sets the homologous chromosomes up for crossing over when homologous chromosomes exchange parts of their DNA with each other. This is represented by what image Q5: At this point, the nuclear envelope is completely dissolved and no longer visible. The homologous chromosomes are lined up in the middle by the mitotic spindle fibers. This happens as the mitotic…arrow_forwardDuring which part of the cell cycle does DNA replication occur and why is it important? Select one: a. Cell Cycle Reason Interphase The new chromosome is split from the original in this step. b. Cell Cycle Reason Interphase New genetic information causes the chromosomes to line up in the middle of the cell. c. Cell Cycle Reason Interphase The semiconservative replication process creates a whole new DNA molecule for one of the newly divided cells. d. Cell Cycle Reason Interphase Each chromosome must be replicated before the cells divide in order for each new cell to get a complete set of genetic information.arrow_forward
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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