Study Notes
Genetic modification involves changing the genetic material of an organism by removing, changing, or inserting individual genes.
- Genetic Engineering — changing the genetic material of an organism by removing, changing, or inserting genes. Example: Inserting human genes into bacteria to produce insulin.
- Genetically Modified Organism (GMO) — an organism that has received genetic material from another organism. Example: Crops modified to resist pests or herbicides.
- Recombinant DNA — DNA that contains genetic material from different organisms. Example: Bacterial DNA with inserted human genes.
- Restriction Enzymes — enzymes used to cut DNA at specific sites, creating sticky ends. Example: Used to isolate the gene for human insulin.
- DNA Ligase — an enzyme that joins DNA fragments together. Example: Joins bacterial plasmid and isolated gene.
Exam Tips
Key Definitions to Remember
- Genetic Engineering: Changing the genetic material of an organism by removing, changing, or inserting genes.
- Genetically Modified Organism (GMO): An organism that has received genetic material from another organism.
- Recombinant DNA: DNA that contains genetic material from different organisms.
Common Confusions
- Confusing genetic engineering with traditional breeding methods.
- Assuming all GMOs are harmful without considering specific modifications.
Typical Exam Questions
- What is genetic engineering? Changing the genetic material of an organism by removing, changing, or inserting genes.
- How is human insulin produced using genetic engineering? By inserting the human insulin gene into bacteria, which then produce insulin.
- What are the advantages of genetically modified crops? They are less prone to pests, require fewer pesticides, and can have increased yields.
What Examiners Usually Test
- Understanding of the process of genetic engineering.
- Examples of genetic modification in crops and bacteria.
- Advantages and disadvantages of genetically modified organisms.