Presentation on theme: "Chapter 13 Genetic Engineering Selective Breeding- choosing what parents you want to produce offspring for the next generation. What do get when you cross."— Presentation transcript:
Chapter 13 Genetic Engineering Selective Breeding- choosing what parents you want to produce offspring for the next generation. What do get when you cross a bull dog and a shitzu? Hybridization- Crossing dissimilar individuals to bring together the best of both organisms. Hybrid Vigor- phenomenon, offspring are better than the parents.
Separating DNA Gel Electrophoresis- DNA Fragments are placed in certain gel wells and an electric voltage is passed through them. DNA molecules move toward the opposite end of the gel. Smaller DNA fragments move faster through the gel.
13.4 Applications of Genetic Engineering Transgenic Organisms- organisms contain genes from other organisms. –Example: The enzyme (luciferase) from fire flies was transferred into a tobacco plant cell. –What do you think happens? The plant glows at dark…page 331
Why make transgenic organisms? Resist pests, herbicides, harsh conditions Improve nutritional value, shelf life Test and study Medical purposes…insulin, growth hormone, clotting factors Transgenic Animals can produce more milk, less fat, human proteins
Cloning Cloning is producing genetically identical cells from a single cell. –Bacteria is easy to clone (unicellular) –What about multicellular organisms? –Ian Wilmut cloned the first sheep. DOLLY.