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Unformatted text preview: 424 Chapter 13 The Dynamic Genome: Transposable Elements CHAPTER OVERVIEW S tarting in the 1930s, genetic studies of maize yielded results that greatly upset the classical genetic picture of genes residing only at fixed loci on the main chromo- some. The research literature began to carry reports sug- gesting that certain genetic elements present in the main chromosomes can somehow move from one location to another. These findings were viewed with skepticism for many years, but it is now clear that such mobile ele- ments are widespread in nature. A variety of colorful names (some of which help to describe their respective properties) have been applied to these genetic elements: controlling elements, jump- ing genes, mobile genes, mobile genetic elements, and transposons. Here we use the terms transposable ele- ments and transposons, which embrace the entire fam- ily of types. Transposable elements can move to new positions within the same chromosome or even to a different chromosome. They have been detected genet-different chromosome....
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This note was uploaded on 01/10/2011 for the course BIOL BIOL taught by Professor Johnson during the Spring '08 term at Aberystwyth University.
- Spring '08