Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 12, Problem 5TYU
Identify at least two events in the cell cycle that must be completed successfully for daughter cells to share an identical complement of chromosomes.
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For an organism with 3 pairs of chromosomes (6 total chromosomes, 2n = 6), draw chromosome diagrams for the following phases of the mitotic cell cycle: G1 of interphase, prophase, metaphase, anaphase & telophase. Be sure to draw the correct number of chromosomes and the correct number of chromatids per chromosome. Use a different color to represent each chromosome type (for example, use blue to indicate all copies of chromosome 1, red for all copies of chromosome 2, & green for all copies of chromosome 3).
Differentiate (in a general sense) cell activities occuring during Interphase and the Mitotic Phase (you could use just 1 word to describe each phase):
1) List and briefly describe three major cell cycle checkpoints. For each checkpoint,predict the consequences if the checkpoint fails to work properly.
2) Explain why mitosis does not produce genetic variation and how meiosis leads to the production of tremendous genetic variation.
Chapter 12 Solutions
Biological Science (7th Edition)
Ch. 12 - 1. Which statement about the daughter cells...Ch. 12 - After S phase, what comprises a single chromosome?...Ch. 12 - Progression through the cell cycle is regulated by...Ch. 12 - 4. What major events occur during anaphase of...Ch. 12 - 5. Identify at least two events in the cell cycle...Ch. 12 - 6. What evidence suggests that during anaphase,...Ch. 12 - 7. Evaluate each of the following defects. Which...Ch. 12 - Prob. 8TYUCh. 12 - Prob. 9TYPSSCh. 12 - Prob. 10TYPSS
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- Describe the general conditions that must be met at each of the three main cell-cycle checkpoints.arrow_forwardCyclin B and Cdk1 make up MPF which is important to the regulation and initiation of mitosis. : a) True b) Falsearrow_forwardIf the most basic function of the cell cycle is to accurately duplicate the DNA in the chromosomes and distribute the copies precisely to the daughter cells, why are there gaps between S-phase and M-phase?arrow_forward
- Cell growth and cell division use a checkpoint at a certain stage of the process. What would be he consequence(s) of a defective checkpoint if the spindle fiber fails to attach to the sister chromatid during meiosis?arrow_forwardA parent cell that has 70 chromosomes undergoes cell division and produces daughter cells that have 70 chromosomes. The resulting daughter cells can be any of the following cell except for:arrow_forwardThe table presents the criteria to be used in comparing motosis and meiosis. Provide the missing information. Mitosis Meiosis chromosome number of daughter cells number of cell divisions stages presence of synapses presence of crossing over cell type that undergoes cell division number of daughter cells formed DNA content of cells at start of division DNA content of daughter cells genetic consequencesarrow_forward
- Draw a diagram of the cell cycle and label the phases (G1, S, G2, M). Indicate the phase when chromosome duplication occurs.arrow_forwardg A A Stage Barrow_forwardillustrate and briefly describe the alignment, pairing, and disjunction ofsister chromatids during mitosis. Include the molecular complexes cohesin and shugoshin and the enzyme separase.arrow_forward
- Match the stage of mitosis with the following key events.arrow_forwardBriefly explain the check-points of the cell cycle.arrow_forwardconsider a diploid cell that contains three pairs of chromosomes designated AA, BB, and CC. Each pair contains a maternal and a paternal member (e.g., Am and Ap, etc.). Using these designations, demonstrate your understanding of mitosis and meiosis by drawing chromatid combinations as requested. Be sure to indicate when chromatids are paired as a result of replication and/or synapsis. You may wish to use a large piece of brown manila wrapping paper or a large cut-up paper bag and work with another student as you deal with these problems. Such cooperative learning may be a useful approach as you solve problems throughout the text. Draw all possible combinations of chromatids during anaphase II in meiosis.arrow_forward
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