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Warm Up

Warm Up. THINK – PAIR – SHARE What genetic technologies do you know of that are in existence? How do you feel about their use?. Genetic Engineers can alter the DNA code of living organisms. Selective Breeding Recombinant DNA PCR Gel Electrophoresis Transgenic Organisms.

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Warm Up

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  1. Warm Up THINK – PAIR – SHARE What genetic technologies do you know of that are in existence? How do you feel about their use?

  2. Genetic Engineers can alter the DNA code of living organisms. Selective Breeding Recombinant DNA PCR Gel Electrophoresis Transgenic Organisms Genetic Engineering

  3. Breed only those plants or animals with desirable traits People have been using selective breeding for 1000’s of years with farm crops and domesticated animals. Selective Breeding

  4. What are some specific examples of selective breeding that you know take place in society? (HINT: Think very generally – there are many examples of this

  5. The ability to combine the DNA of one organism with the DNA of another organism. Recombinant DNA technology was first used in the 1970’s with bacteria. Recombinant DNA

  6. Remove bacterial DNA (plasmid). Cut the Bacterial DNA with “restriction enzymes”. Cut the DNA from another organism with “restriction enzymes”. Combine the cut pieces of DNA together with another enzyme and insert them into bacteria. Reproduce the recombinant bacteria. The foreign genes will be expressed in the bacteria. Recombinant Bacteria

  7. Benefits of Recombinant Bacteria • Bacteria can make human insulin or human growth hormone. 2. Bacteria can be engineered to “eat” oil spills.

  8. Explain the process by which recombinant bacteria is created. What do you think could be some cons to the development of recombinant bacteria?

  9. PLANTS disease-resistant and insect-resistant crops 2. Hardier fruit 3. 70-75% of food in supermarket is genetically modified. The DNA of plants and animals can also be altered.

  10. 1.Create recombinant bacteria with desired gene. 2. Allow the bacteria to “infect" the plant cells. 3. Desired gene is inserted into plant chromosomes. How to Create a Genetically Modified Plant

  11. TRANSGENIC ANIMALS Mice – used to study human immune system Chickens – more resistant to infections Cows – increase milk supply and leaner meat 4. Goats, sheep and pigs – produce human proteins in their milk Genetically modified organisms are called transgenic organisms.

  12. How to Create a Transgenic Animal Desired DNA is added to an egg cell.

  13. Scientists used a bioluminescent gene from a jellyfish to create “glowing” green mice!

  14. How do you create a genetically modified plant? What are transgenic organisms?

  15. PCR allows scientists to make many copies of a piece of DNA. Heat the DNA so it “unzips”. 2. Add the complementary nitrogenous bases. 3. Allow DNA to cool so the complementary strands can “zip” together. Polymerase Chain ReactionPCR

  16. This technology allows scientists to identify someone’s DNA! Gel Electrophoresis

  17. 1. “Cut” DNA sample with restriction enzymes. 2. Run the DNA fragments through a gel. 3. Bands will form in the gel. 4. Everyone’s DNA bands are unique and can be used to identify a person. 5. DNA bands are like “genetic fingerprints”. Steps Involved in Gel Electrophoresis

  18. What is PCR?What is gel electrophoresis?

  19. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

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