Concepts of Genetics (12th Edition)
12th Edition
ISBN: 9780134604718
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
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Chapter 2, Problem 22PDQ
Describe the “folded-fiber” model of the mitotic chromosome.
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Describe the folded-fiber model of the mitotic chromosome.
illustrate and briefly describe the alignment, pairing, and disjunction ofsister chromatids during mitosis. Include the molecular complexes cohesin and shugoshin and the enzyme separase.
: How many chromatids are present for each type of chromosome at the completion of crossing over? What two structures hold the chromatids together at this stage?
Chapter 2 Solutions
Concepts of Genetics (12th Edition)
Ch. 2 - With the initial appearance of the feature we call...Ch. 2 - An organism has a diploid number of 16 in a...Ch. 2 - Examine Figure 2.12, which shows oogenesis in...Ch. 2 - Over a period of two years, a man in his early 20s...Ch. 2 - Over a period of two years, a man in his early 20s...Ch. 2 - Over a period of two years, a man in his early 20s...Ch. 2 - In this chapter, we focused on how chromosomes are...Ch. 2 - Review the Chapter Concepts list on page 14. All...Ch. 2 - What role do the following cellular components...Ch. 2 - Discuss the concepts of homologous chromosomes,...
Ch. 2 - If two chromosomes of a species are the same...Ch. 2 - Describe the events that characterize each stage...Ch. 2 - How are chromosomes named on the basis of their...Ch. 2 - Contrast telophase in plant and animal mitosis.Ch. 2 - Describe the phases of the cell cycle and the...Ch. 2 - Define and discuss these terms: (a) synapsis, (b)...Ch. 2 - Contrast the genetic content and the origin of...Ch. 2 - Given the end results of the two types of...Ch. 2 - Contrast spermatogenesis and oogenesis. What is...Ch. 2 - Explain why meiosis leads to significant genetic...Ch. 2 - A diploid cell contains three pairs of homologous...Ch. 2 - Considering Problem 15, predict the number of...Ch. 2 - During oogenesis in an animal species with a...Ch. 2 - What is the probability that, in an organism with...Ch. 2 - The nuclear DNA content of a single sperm cell in...Ch. 2 - Describe the role of meiosis in the life cycle of...Ch. 2 - Contrast the chromatin fiber with the mitotic...Ch. 2 - Describe the folded-fiber model of the mitotic...Ch. 2 - Prob. 23PDQCh. 2 - If one follows 50 primary oocytes in an animal...Ch. 2 - In mitosis, what chromatid combination(s) will be...Ch. 2 - During meiosis I, assuming no crossing over, what...Ch. 2 - Are there any possible combinations present during...Ch. 2 - Draw all possible combinations of chromatids...Ch. 2 - Assume that during meiosis I none of the C...Ch. 2 - Assume that each gamete resulting from Problem 29...Ch. 2 - A species of cereal rye (Secale cereale) has a...Ch. 2 - An interesting procedure has been applied for...Ch. 2 - Assume that you were examining a first polar body...Ch. 2 - Kuliev and Verlinsky (2004) state that there was a...
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- Describe the critical events of mitosis that are responsible for ensuring that each daughter cell receives a full set of chromosomes from the parent cell.arrow_forwardList three ways in which mitosis differs from meiosos. Be specificarrow_forwardDuring which phase of the mitotic cycle would the terms chromosome and chromatic refer to identical structures?arrow_forward
- In meiosis, each centromere has a spindle fiber attached only to one side. In mitosis, each centromere has a spindle attached to how many sides?arrow_forwardWhat are the parts of cell involved during meiotic division? Specify the parts during prophase, metaphase, anaphase, and telophase.arrow_forwardg A A Stage Barrow_forward
- consider 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_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_forwardA diploid cell has 4C genetic material and 16 chromosomes at the start of cell division. Identify number of set/s of chromosomes per cell after mitosis, number of set/s of chromosomes at Telophase 1, and number of chromosomes per cell at Telophase 1.arrow_forward
- In mitosis, what chromatid combination(s) will be present during metaphase? What combination(s) will be present at each pole at the completion of anaphase?arrow_forwardDiscuss the significance of the mitotic process and meiotic process.arrow_forwardName the five steps of mitosis, and draw thestructure and position of the chromosomes at each steparrow_forward
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