Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 16, Problem 4CONQ
What is the key difference between
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In a qPCR experiment, you find that the mRNA for the gene CDK1 goes down (decreased expression) when you treat your cells with doxorubicin. You wonder whether this is due to epigenetic changes on the gene for CDK1. Name two methods that you might use to check whether there are changes in epigenetic modifications (e.g. DNA methylation or histone tail modifications) on the CDK1 DNA.
In general, explain how epigenetic modifications are an important mechanism for developmental changes that lead to specialized body parts and cell types. How do the protein complexes called the trithorax and polycomb groups participate in this process?
A gene, which we will call gene C, can be epigenetically modified in such a way that its expression in some cells is permanently silenced. Describe how you could conduct cell-fusion experiments to determine if a cis- or a trans-epigenetic mechanism is responsible for maintaining the silencing of gene C.
Chapter 16 Solutions
Genetics: Analysis and Principles
Ch. 16.1 - Which of the following are examples of molecular...Ch. 16.1 - 2. An epigenetic modification to a specific gene...Ch. 16.1 - Prob. 3COMQCh. 16.1 - Epigenetic changes may a. be programmed during...Ch. 16.2 - 1. For the Igf2 gene, where do de novo methylation...Ch. 16.2 - 2. For XCI to occur, where are the Xist and Tsix...Ch. 16.2 - 3. Which of the following possibilities could...Ch. 16.3 - 1. Which of the following statements about...Ch. 16.3 - The effects of paramutation may vary with regard...Ch. 16.4 - 1. When mice carrying theallele exhibit a darker...
Ch. 16.4 - 2. If the VIN3 gene had a loss-of-function...Ch. 16.5 - Prob. 1COMQCh. 16.5 - Prob. 2COMQCh. 16 - Prob. 1CONQCh. 16 - List and briefly describe five types of molecular...Ch. 16 - Prob. 3CONQCh. 16 - What is the key difference between cis and...Ch. 16 - Prob. 5CONQCh. 16 - Prob. 6CONQCh. 16 - 7. Outline the molecular steps in the process of...Ch. 16 - Prob. 8CONQCh. 16 - 9. In general, explain how epigenetic...Ch. 16 - 10. What are the contrasting roles of trithorax...Ch. 16 - Describe the molecular steps by which polycomb...Ch. 16 - Prob. 12CONQCh. 16 - Using coat color in mice and the development of...Ch. 16 - How can environmental agents that do not cause...Ch. 16 - Prob. 15CONQCh. 16 - Prob. 16CONQCh. 16 - Explain how the VIN3/PRC2 complex specifically...Ch. 16 - Prob. 1EQCh. 16 - In the experiments described in Figure 16.8,...Ch. 16 - Prob. 3EQCh. 16 - A research study indicated that an agent in...Ch. 16 - Lets suppose you were interested in developing...Ch. 16 - Prob. 6EQCh. 16 - Prob. 7EQCh. 16 - 2. Discuss the similarities and differences of...
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- What makes X inactivation an epigenetic phenotype?arrow_forward"Tobacco smoking triggers a large number of somaticmutations and epigenetic changes". Define about this ?arrow_forwardHow does the activity of human p53 get regulated through the interaction of the transactivation domains with its corresponding macromolecules when the cell is under stress vs unstressed conditions? based on this articles Primary paper: Lee, C. W., Martinez-Yamout, M. A., Dyson, H. J., & Wright, P. E. (2010). Structure of the p53 Transactivation Domain in Complex with the Nuclear Receptor Coactivator Binding Domain of CREB Binding Protein. Biochemistry, 49(46), 9964–9971. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2982890/#SD1 https://www.rcsb.org/structure/2L14 PDB file for TAD domainarrow_forward
- Is paramutation a cis- or a trans-epigenetic mechanism?arrow_forwardIf p63 can bind to the same promoter elements as p53, why would it be considered an inhibitor of p53? Can you clarify this relationship a bit?arrow_forwardAlthough each cell in your body contains the same set of genes, the genes that are “turned on” differ depending on the type of cell. What signals different genes to be “turned on” or transcribed in different cells? What types of behaviours or environmental circumstances can lead to changes in an individual’s epigenome? Explain. 3. Explain how changes in your epigenome can alter the DNA of your future children before they are even born. 4.) Explain TWO implications of these findings for society. (Hint: think big! Implications for how disease is transmitted, intergenerational trauma, the cycle of poverty, etc.)arrow_forward
- Using coat color in mice and the development of female honeybees as examples, explain how dietary factors cause epigenetic modifications and thereby lead to phenotypic effects.arrow_forwardList and briefly describe five types of molecular mechanisms thatmay underlie epigenetic gene regulation.arrow_forwardUsing coat color in mice and the development of female honeybees as examples, explain how dietary factors can cause epigenetic modifications, leading to phenotypic effects.arrow_forward
- Can you please help me by drawing a serie of schematic figures that demonstrates the information in the paragraph below? In addition to phosphorylation, the C-terminal domain of p53 can also be acetylated and sumolated in response to DNA damage. Acetylation and sumolation both result in an increase in the transactivation ability of p53 and may account for this finding. In vivo, IR induces the acetylation of p53 at Lys320 by PCAF and Lys382 by CBP/p300. Acetylation at these sites is dependent on N-terminal phosphorylation at Ser15 and to a lesser extent on phosphorylation at Ser6, Ser9, and Thr18 (Saito et al., 2002; Wahl and Carr, 2001). All of these phosphorylation events are ATM-dependent, although only Ser15 has been shown to be phosphorylated directly by ATM. Sumolation occurs at Lys386 after DNA damage (Muller et al., 2000). Sumolation refers to the covalent attachment of a small ubiquitin-like molecule (SUMO-1) to Lys residues, but in contrast to ubiquitination, does not result…arrow_forwardIn addition, when ARF is artificially expressed in normal cells, a rapid increase in p53 levels is observed. Studies have demonstrated that ARF, when expressed, is associated with Mdm2. When associated, the two proteins display a particular pattern of localization restricted to the nucleolus. Suggest a mechanism by which ARF leads to p53 build-up.arrow_forwardhttps://ny.pbslearningmedia.org/resource/biot09.sci.life.gen.epigenetics/epigenetics/ In what way do the brown and yellow mice shown in the video differ?Why is this so?arrow_forward
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