BIOL239 Lecture Notes - Stol, Retrovirus, Sister Chromatids
13 Sep 2014
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Document Summary
Small segments of dna (50-10,000bp) which are able to move from one position to another in the genome. Can be present in thousands of copies throughout the genome. Ex: human genome ~40% consists of transposable elements. Work by marcus rhoades (1930s) and barbara mcclintock (1950s) with corn inferred the presence of transposable elements: transposable elements. Need not to be sequences that do anything for or against the organism. Many are regarded as selfish" carrying only information required for their own propagation. Why is there so much junk" dna? http://www. rps. psu. edu/probing/junkdna. html. They have actually given rise to some proteins that we would otherwise not have: transposable elements in prokaryotes. Dna elements that can excise themselves and move from place to place within the genome: transposable elements in prokaryotes. Code for the transposase enzyme, which cuts at the irs (inverted repeats) and cuts the host. Dna for is movement: transposable elements in prokaryotes, transposable elements in prokaryotes.
