Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 25.5, Problem 5COMQ
Summary Introduction
Introduction:
Tumor-suppressor gene slows down the rate of cancer cell division. The loss of function of negative regulator cells leads to abnormal growth of cancer cells. There are several different mechanisms and processes that help to prevent the mutation ofnormal cells to cancerous cells.
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Most forms of cancer involvea. the activation of a single oncogene.b. the inactivation of a single tumor-suppressor gene.c. the activation of multiple oncogenes.d. the activation of multiple oncogenes and the inactivation ofmultiple tumor-suppressor genes.
Normal (nonmutant) tumor-suppressor genes often functiona. as negative regulators of cell division.b. in the maintenance of genome integrity.c. in the stimulation of cell division.d. as both a and b.
Which of the following accurately compares tumor suppressor genes and proto-oncogenes?
A. Both tumor suppressor and proto-oncogenes prevent the spread of cancer by targeting and destroying existing cancer cells.
B. A person who has both tumor suppressor and proto-oncogenes will always develop cancer.
C. Proto-oncogenes code for growth factors, while tumor suppressor genes inhibit cell division of damaged cells.
D. When a proto-oncogene mutates, it becomes a tumor suppressor gene.
Chapter 25 Solutions
Genetics: Analysis and Principles
Ch. 25.1 - Which of the following wouldnotbe consistent with...Ch. 25.1 - 2. Assuming complete penetrance, which type of...Ch. 25.1 - 3. Which of the following is not a common...Ch. 25.1 - Prob. 4COMQCh. 25.2 - Prob. 1COMQCh. 25.2 - Haplotype association studies are aimed at the...Ch. 25.3 - 1. Which of the following is not a method used in...Ch. 25.3 - 2. Which of the following prenatal genetic testing...Ch. 25.4 - Prob. 1COMQCh. 25.5 - 1. An oncogene is produced from a ________that has...
Ch. 25.5 - Which of the following is a type of genetic change...Ch. 25.5 - 3. Tumor-suppressor genes promote cancer...Ch. 25.5 - 4. Normal (nonmutant) tumor-suppressor genes often...Ch. 25.5 - Prob. 5COMQCh. 25.6 - Prob. 1COMQCh. 25 - 1. With regard to pedigree analysis, make a list...Ch. 25 - 2. Explain, at the molecular level, why human...Ch. 25 - 3. Many genetic disorders exhibit locus...Ch. 25 - Prob. 4CONQCh. 25 - Prob. 5CONQCh. 25 - Figure 25.1 illustrates albinism in two different...Ch. 25 - Prob. 7CONQCh. 25 - Prob. 8CONQCh. 25 - Ehler-Danlos syndrome is a rare disorder caused by...Ch. 25 - 10. Hurler syndrome is due to a mutation in a gene...Ch. 25 - Like Hurler syndrome, Fabry disease involves an...Ch. 25 - Achondroplasia is a rare form of dwarfism caused...Ch. 25 - Prob. 13CONQCh. 25 - 14. Marfan syndrome is due to a mutation in a...Ch. 25 - 15. Sandhoff disease is due to a mutation in a...Ch. 25 - Describe the two assumptions that underlie the...Ch. 25 - Prob. 17CONQCh. 25 - What is a prion? Explain how a prion relies on...Ch. 25 - 19. Some people have a genetic predisposition for...Ch. 25 - What is the difference between an oncogene and a...Ch. 25 - Prob. 21CONQCh. 25 - Prob. 22CONQCh. 25 - Prob. 23CONQCh. 25 - Prob. 24CONQCh. 25 - Prob. 25CONQCh. 25 - Prob. 26CONQCh. 25 - Prob. 27CONQCh. 25 - With regard to cancer cells, which of the...Ch. 25 - Prob. 29CONQCh. 25 - 1. Which of the following experimental...Ch. 25 - Prob. 2EQCh. 25 - 3. What is meant by the term genetic testing? How...Ch. 25 - Prob. 4EQCh. 25 - 5. Chapter 21 describes a method known as Western...Ch. 25 - 6. An experimental assay for the blood-clotting...Ch. 25 - 7. Discuss ways to distinguish whether a...Ch. 25 - 8. The codon change (Gly-12 to Val-12) in...Ch. 25 - Explain how DNA microarrays are used in molecular...Ch. 25 - Make a list of the benefits that may arise from...Ch. 25 - 2. Our government has finite funds to devote to...Ch. 25 - Prob. 3QSDC
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- Explain the difference between a proto-oncogene and a tumor suppressor gene.arrow_forwardWhich of the following factors contributes to angiogenesis as a result of a tumor growth? Select all that apply: a. Increasing tumor's access to oxygen and nutrients b. Increasing tumor's ability for growth, invasion, and metastasis c. Increasing expression of proto-oncogenes for cancer cells d. Increasing expression of tumor-suppressor genes for cancer cellsarrow_forwardWhich of the following demonstrates the link between oncogenes and cancer? a.Oncogenes do not have mutations that increase the activity or number of molecules that stimulate mitosis. b.Oncogenes produce molecules that inhibit mitosis. c.They are genes that transform tumor cells into normal cells. d.The mutations in oncogenes increase the activity or number of molecules that stimulate mitosis, leading to irregular cell division.arrow_forward
- Which of the following statements correctly describes a characteristic of tumor-suppressor gene? a) they are frequently overexpressed in cancerous cells. b) they are cancer-causing genes introduced into cells by viruses. c) they encode proteins that help prevent uncontrolled cell growth. d) they often encode proteins that stimulate the cell cycle.arrow_forwardTumor Suppressor Genes are often called as gatekeepers because: a. They signify their involvement in governing the dynamics of cell proliferation b. They allow tumors to proliferate at an uncontrolled rate c. To allow a transport channel of suppressors d. They are not referred to as ?gatekeepers?arrow_forwardCompare and contrast oncogenes and tumor suppressor genes.arrow_forward
- Describe the difference between a tumor suppressor and an oncogene with respect to the actual causes of cancer.arrow_forwardTissues and differentiation: a) Explain what is meant by determination and differentiation b) Explain the difference between an oncogene and a tumor suppressor gene and describe how they are involved in the development of cancerarrow_forwardApart from p53, mention and describe the function of three tumor suppressor genes you knowarrow_forward
- Tumor-suppressor genes promote cancer whena. they are overexpressed.b. they are expressed in the wrong cell type.c. their function is inactivated.d. they are expressed at the wrong stage of development.arrow_forwardCancer causing genes are called ________. a. transformation genes b. tumor suppressor genes c. oncogenes d. mutated genesarrow_forwardDescribe two mechanisms by which genetic change causes cancer.arrow_forward
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