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Pcr Technology Lab Report

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Name: Katelynn Maxwell Date: December 8, 2014

Abstract

The purpose of the PCR Technology experiment was to determine the size of each of our visible DNA fragments as well as approximating the amount of tandem repeats our DNA has. In order to determine all that did, we started by spitting in a tube and then spinning our cheek cells in a clinical centrifuge. Once the centrifuge was done spinning our cells, we placed them into a microfuge. Later, we put the microfuge into a boiling bath as well as ice. We obtained a PCR tube with a bead and then added contents to it and had it placed in a thermal cycler. We also created a ladder as well as positive and negative controls …show more content…

PCRs, or polymerase chain reactions, synthesis DNA strands complementary to a template strand (1). In order for a complete PCR reaction to take place, there are three steps that must take place. First, denaturation occurs. This means that the DNA is heated to 95°C in order to make it single-stranded. Next, annealing takes place, usually around 65°C. This is when two primers add to a complementary strand of DNA. Finally, primer extension occurs at 72°C. This is when DNA polymerase adds the enzyme Taq Polymerase to the primer by polymerase activity. The PCR steps are repeated about thirty times with each cycle taking approximately 5 minutes. Through PCRs, a small amount of DNA is able to be transformed into large amount of DNA in a short amount of time (2). The different machinery that we used included a thermal cycler, agarose gel electrophoresis and a transilluminator. A thermal cycler is the instrument that is used that gives us the exact temperatures needed to complete the PCR. The thermal cycler is able to be used in cloning, sequencing, analysis as well as genotyping (3). The agarose gel electrophoresis is a way …show more content…

2. McClean, Phillip. (1997). Cloning and molecular analysis of genes: Polymerase chain reaction (or PCR). Retrieved on December 6, 2014, from http://www.ndsu.edu/pubweb/~mcclean/plsc431/cloning/ clone9.htm.

3. Life Technologies. (2014). PCR thermal cyclers from applied biosystems. Retrieved on December 6, 2014, from http://www.lifetechnologies.com/us/en/home/life-science/pcr/thermal-cyclers-realtime- instruments/thermal-cyclers.html.

4. (n.d.). Agarose gel electrophoresis. Retrieved on December 6, 2014, from http://faculty.plattsburgh. edu/donald.slish/Electrophoresis.html.

5. Scott, Boyd. (March 27, 2007). Biocompare: Molecular imager chemidoc xrs system from bio-rad. Retrieved on December 6, 2014, from http://www.biocompare.com/Product-Reviews/40446- Molecular-Imager-ChemiDoc-XRS-System-From-Bio-Rad/.

6. (December 1, 2014). Genetics home reference: Variable number tandem repeats. Retrieved on December 6, 2014, from http://ghr.nlm.nih.gov/glossary=variablenumbertandemrepeats.

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