Autoselection: selfish genetic elements

Graham Bell

in Selection

Second edition

Published in print December 2007 | ISBN: 9780198569725
Published online May 2008 | e-ISBN: 9780191717741 | DOI:
 Autoselection: selfish genetic elements

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Genetic elements that spread by parasitizing the replicative machinery of a host cell are common inhabitants of the genome, especially in multicellular sexual organisms. They show how genetic elements can evolve despite reducing the fitness of individuals. The first section in this chapter is all about infection and explains the following: bacterial plasmids; 2-micron plasmid of yeast; transposable elements; transposons as regulatory elements; transposons as mutator elements; transposons as hitch-hiking elements; transposons as selfish genetic elements; the spread of transposable elements; parasites of transposons'; selfish mitochondria; and finally population genetic engineering. The second section is about interference and describes the Poison-Antidote system; Gamete Killers; meiotic drive on sex-chromosomes; and phoenix elements. The final section in this chapter, called Gonotaxis, describes B-chromosome; and infectious agents that control sexual development.

Keywords: plasmid; transposable element; retrotransposon; meiotic drive; gamete killer; homing endonuclease; B-chromosome; sex-ratio; P-element

Chapter.  12591 words.  Illustrated.

Subjects: Evolutionary Biology

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