Biology 311C Lecture 26 Part 2

Biology 311C Lecture 26 Part 2 - infects bacteria, it takes...

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October 26, 2011 Biology 311C Lecture 26 Part 2 In the 1860’s, Gregory Mendel (father of modern genetics) was interested in how traits are passed from one generation to the next. His experiments led him to understand patterns of inheritance using around 29,000 pea plants (he could not see chromosomes). Many scientists believed that proteins were a good candidate but did not know why. Chromosomes are made out of proteins and DNA and they didn’t know what was being handed down. A model system was used by using a virus that infects bacteria (E. coli). When a virus
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Unformatted text preview: infects bacteria, it takes over its machinery and uses its cells to make copies of its genetic material. • A virus is basically DNA or RNA wrapped in protein and infects cells. • Sulfur is only found in protein so when the virus inserts its genetic material, the protein inside the cell would be radioactive, but it is not. • They use phosphorous to try to detect DNA inside the cell so after centrifuging, the pellet is radioactive because of the phage DNA. •...
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This note was uploaded on 02/21/2012 for the course BIO 311 C taught by Professor Mcclelland during the Fall '09 term at University of Texas.

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