1. What do you use to cut out the gene? CIRCULAR PIECE OF BACTERIAL DNA
Transgenic Organisms
The Steps
Isolate & cut out the good gene you want
What do you use to cut out the gene?
RESTRICTION ENZYME
Remove a plasmid from a bacteria
What is a plasmid?
CIRCULAR PIECE OF BACTERIAL DNA
3. Splice (attach) the human DNA to the plasmid
4. Insert the recombinant plasmid back into the bacteria
5. Let the bacteria divide, making more copies of the human gene
Recombinant DNA – DNA that is made up from more than 1 source
Transgenic Organism – an organism that has recombinant DNA

2. Because they have VERY FAST reproduction rates
Why do we use bacteria?
Because they have VERY FAST reproduction rates

3. Transgenic Organisms 3 kinds
Transgenic microorganisms (bacteria) – can be used to make human growth hormone (dwarfism), insulin (diabetes), clean up oil spills (environment)
Transgenic plants – can be made stronger (pest resistant, pesticide resistance, frost resistant, spoilage resistant)
Stronger crops lead to better food supply
Crops can also contain extra vitamins (better nutrition)
Transgenic animals
Mice with human immune systems (better/safer drug testing for medicine)
Cows/chickens produce more meat (better food supply)

5. WARNING!!
WalMart is now selling corn on the cob that has been genetically modified. It has a bacterial gene that kills corn pests by dissolving their stomachs (the pest bleeds to death). The corn crop is stronger…but no one knows how much corn is now safe to eat before your stomach starts to dissolve.

6. Is it worth it?

7. Gel Electrophoresis
Everyone’s DNA cuts apart into DIFFERENT size pieces, because everyone has a DIFFERENT sequence of nitrogen bases (ATCG)
1. Take a DNA sample and cut it apart using a RESTRICTION ENZYME
Smaller DNA pieces will move FARTHER & larger DNA will move LESS
3. Run electrical current through GEL…DNA will move to POSITIVE end because DNA is NEGATIVELY charged
2. Inject DNA fragments into
GEL ELECTROPHORESIS

8. Compare your DNA band patterns to find your:
Criminal – ALL bands must match
B. Daddy – HALF the bands must match

9. Who Dun It?
Suspect 3

10. NEITHER
Who’s the daddy?