Presentation on theme: "LO: How do scientists use recombinant DNA technology? DN: June 2013 #1-5 HW: June 2013 #44-49."— Presentation transcript:
LO: How do scientists use recombinant DNA technology? DN: June 2013 #1-5 HW: June 2013 #44-49
What is Genetic Engineering? Genetic Engineering is a process that scientists use to ______ the ________ instructions in organisms. alter genetic
Why would altering DNA affect our characteristics/traits? DNA codes for the proteins that determine our traits.
Why would scientists want to alter the genetic instructions of organisms? + Scientists can generate organisms with desired characteristics.
How is DNA Modified? Step 1: DNA is first _________________ from cells. DNA +..ATGAATTCT....TACTTAAGA.. DNA..ATGAATTCT....TACTTAAGA.. extracted(removed)
Step 2: DNA is then cut into smaller pieces with ____________________ ATGAATTCT TACTTAAGA Restriction enzymes are “scissor-like” enzymes that _________ and ___ specific sequences in the ____. ATG AATTCT TACTTAA GA Restriction Enzymes. recognizecut DNA
What base sequences were these Restriction Enzymes specific for? ATGAATTCT TACTTAAGA ATG AATTCT TACTTAA GA GA “Sticky Ends”
Step 3: The cut DNA sequence is then _________ with the DNA of ________ organism. + Cut DNA Cut DNA from another cell DNA from 2 sources ATG AATTCT TACTTAA GA ATGAATTCT TACTTAAGA combinedanother
What do we call DNA that comes from 2 sources? Source 1 Source 2 Recombinant DNA
Gene Splicing The process that allows scientists to _______ pieces of ____ segments to the ____ of other organisms is called: ______________ DNA Ligase attach DNA GENE SPLICING
“Cut DNA” + “Cut DNA” Recombinant DNA Step 4: The _________________ is then placed inside a living cell. What will the recombined DNA do? It will allow for the production of _________ from _____ sources of DNA. recombinant DNA proteins both
Applications of Genetic Engineering: 1)Scientists can target and identify a _____. 2)Cut the gene with __________________. gene restriction enzymes
3)This gene is then _________ to the DNA of another organism. 4)Once in the new organism, the transferred genes direct the new organism’s cells to make the same ________ as the original organism. “spliced” protein