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Unformatted text preview: MICROBIAL GENETICS While a gene is being used as a pattern, the two strands of DNA must be separated. The hydrogen bonds that link the strands are weak and easily broken. The two strands of DNA must also separate when the DNA is replicated prior to cell division. DNA can change (mutate). This is often damaging or fatal to the cell, but some mutations are favorable, creating new characteristics that give an advantage for survival. GENOTYPE AND PHENOTYPE Genotype—the entire genetic makeup of the organism--all of its DNA. Not every gene is expressed all of the time, but the potential is there. If a change in genotype occurs, it is considered permanent. Phenotype—expressed properties. In macroscopic organisms, this often refers to appearance. In microbes, on a molecular level, this could refer to the collection of proteins the organism is...
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.
- Fall '09