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 10CONQ
What are the contrasting roles of trithorax and polycomb group complexes during development in animals and plants?
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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 trithorax and polycomb group complexes participate in thisprocess?
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?
What would be the most likely effect of inhibiting the translation of hunchback mRNA throughout a Drosophila embryo?
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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- Early development depends on the temporal and spatial interplay between maternally supplied material and mRNA and the onset of zygotic gene expression. Maternally encoded mRNAs must be produced, positioned, and degraded [Surdej and Jacobs-Lorena (1998). Mol. Cell Biol. 18:2892–2900]. For example, transcription of the bicoid gene that determines anterior– posterior polarity in Drosophila is maternal. The mRNA is synthesized in the ovary by nurse cells and then transported to the oocyte, where it localizes to the anterior ends of oocytes. After egg deposition, bicoid mRNA is translated and unstable bicoid protein forms a decreasing concentration gradient from the anterior end of the embryo. At the start of gastrulation, bicoid mRNA has been degraded. Consider two models to explain the degradation of bicoid mRNA: (1) degradation may result from signals within the mRNA (intrinsic model), or (2) degradation may result from the mRNA’s position within the egg (extrinsic model).…arrow_forwardWhat would be the most likely result of injecting bicoid mRNA into the posterior end of a Drosophila embryo and inhibiting the translation of nanos mRNA?arrow_forwardWith regard to development, what would the dire consequences beif polycomb group complexes did not function properly?arrow_forward
- What is the result when the core histones are acetylated via histone acetyltransferase? A) The result depends on which histone is modified. B) The DNA becomes more tightly associated with the core. O C) The DNA becomes less associated with the core. This modification has no effect on how tightly associated DNA will become with the core.arrow_forwardDescribe the molecular steps by which polycomb groups cause epigenetic gene silencing.arrow_forwardHow does histone acetyltransferase affect nucleosome structure and transcription?arrow_forward
- What kind of response is seen via temperature stress in Drosophila? Are these kinds of elements conserved in all organisms? What is the role of the final protein element translated?arrow_forwardHow is epigenetic information similar to and different from genetic information? What attributes of epigenetic information make it critical for cellular differentiation in multicellular eukaryotes? asaparrow_forwardWhat is the importance of the histone proteins present in the nucleus?arrow_forward
- What is meant by the term histone code? With regard to gene regulation, what is the proposed role of the histone code?arrow_forwardExplain the Retrotransposons—the Copia –White-Apricot System in Drosophila ?arrow_forwardWhat is a nucleosome-free region? Where are such regions typically found in a genome? How are nucleosome-free regions thought to be functionally important?arrow_forward
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