Chapter 13 Genetic Engineering Section Review Answer Key 1

Chapter 13 Genetic Engineering Section Review Answer Key 1 Chapter 13 Genetic Engineering Section Review Answer Key 1 Section Insert Section Title Here Learning Objectives Students will be able to define key terms related to genetic engineering Students will be able to explain the process of gene cloning Students will be able to describe the different types of genetic engineering techniques Students will be able to identify potential benefits and risks associated with genetic engineering Answer Key 1 Define the following terms Gene cloning The process of creating multiple identical copies of a specific gene Recombinant DNA DNA that has been created by combining genetic material from different sources Restriction enzymes Enzymes that cut DNA at specific sequences Vectors Carriers that are used to introduce foreign DNA into host cells Transformation The process of introducing foreign DNA into a host cell Transgenic organism An organism that contains genetic material from a different species Gene therapy The use of genes to treat or prevent disease Bioethics The study of ethical issues related to biotechnology 2 Describe the process of gene cloning Isolation of the desired gene The target gene is isolated from the organisms DNA Insertion into a vector The isolated gene is inserted into a vector such as a plasmid or a virus Transformation of host cells The vector containing the gene is introduced into host cells Selection of transformed cells Cells that have successfully taken up the foreign DNA are selected Replication of the cloned gene The host cells replicate producing multiple copies of the 2 cloned gene 3 Explain the difference between restriction enzymes and ligases Restriction enzymes are enzymes that cut DNA at specific sequences They act like molecular scissors creating fragments of DNA with sticky ends Ligases are enzymes that join DNA fragments together They act like molecular glue sealing the gaps between DNA fragments 4 Describe three different types of genetic engineering techniques Gene cloning Used to create multiple copies of a specific gene Applications include producing large amounts of proteins for medical or industrial use Gene therapy Involves introducing a functional gene into a patients cells to correct a genetic disorder This is a promising treatment approach for various diseases Transgenic organisms Organisms that contain genetic material from a different species They can be engineered to produce valuable products improve crop yields or develop disease resistance 5 List three potential benefits and three potential risks of genetic engineering Benefits Medical advancements Develop treatments for genetic diseases and other conditions Increased crop yields Develop crops that are resistant to pests diseases and harsh environmental conditions leading to higher yields and reduced reliance on pesticides Improved animal health Develop animals that are resistant to diseases and produce more milk meat or eggs Risks Unforeseen consequences Potential for unintended side effects such as the creation of new pathogens or allergic reactions Ethical concerns Questions about the potential misuse of genetic engineering such as the creation of designer babies or the development of genetically modified organisms that could harm the environment Economic inequality Potential for widening the gap between rich and poor if genetic engineering technologies are only accessible to the wealthy 6 Discuss the ethical issues surrounding genetic engineering Human enhancement Should we use genetic engineering to enhance human capabilities beyond medical necessity 3 Genetic discrimination Will genetic information be used to discriminate against individuals for example in hiring or insurance Access to technology Will genetic engineering technologies be accessible to all people or will they only be available to the wealthy Impact on the environment What are the potential risks of releasing genetically modified organisms into the environment 7 Explain how genetic engineering could be used to treat cystic fibrosis Cystic fibrosis is a genetic disease caused by a mutation in the CFTR gene Gene therapy could be used to deliver a functional copy of the CFTR gene to the cells of patients with cystic fibrosis thereby correcting the genetic defect and potentially curing the disease 8 Describe how genetic engineering could be used to create pestresistant crops Genetic engineering could be used to introduce genes into crops that provide resistance to certain pests For example genes from Bacillus thuringiensis Bt bacteria can be inserted into crops producing toxins that are lethal to certain insect pests but harmless to humans This results in reduced reliance on chemical pesticides reducing environmental damage and improving agricultural sustainability 9 Explain the difference between gene editing and gene therapy Gene editing involves directly altering the DNA sequence of an organism This can be used to correct genetic defects introduce new traits or modify existing genes Gene therapy involves introducing a functional gene into a patients cells to treat or prevent disease It typically involves inserting a gene into a vector which then delivers the gene to target cells 10 Discuss the potential impact of CRISPRCas9 technology on genetic engineering CRISPRCas9 is a powerful new gene editing technology that allows scientists to make precise changes to DNA sequences CRISPRCas9 has the potential to revolutionize genetic engineering enabling scientists to develop new treatments for genetic diseases enhance crop yields and engineer organisms with novel traits However the technology also raises ethical concerns such as the potential for unintended consequences and the possibility of its misuse 4 Additional Resources Insert relevant links to websites articles or videos that provide further information on genetic engineering Assessment Students can be assessed through a combination of written assignments class discussions and laboratory activities Written assignments could include short answer questions essays and research reports Class discussions can be used to explore the ethical and societal implications of genetic engineering Laboratory activities could involve the use of simulations or realworld examples to illustrate the principles of genetic engineering This detailed answer key and accompanying resources will help students understand the basics of genetic engineering explore its potential benefits and risks and engage in critical discussions about its ethical and societal implications