Difference between revisions of "Deletion"

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Deletion of a DNA segment can happen if it is bordered by direct repeats. These repeats can be introduced by insertion of same transposons in identical orientation. DNA will fold back in a closed loop structure with direct repeats positioned in a way two homologous chromosomes aligned in metaphase. This structure of DNA allows recombination to happen between two repeats resulting in a deletion of one repeat region and genes within the direct repeats.  
 
Deletion of a DNA segment can happen if it is bordered by direct repeats. These repeats can be introduced by insertion of same transposons in identical orientation. DNA will fold back in a closed loop structure with direct repeats positioned in a way two homologous chromosomes aligned in metaphase. This structure of DNA allows recombination to happen between two repeats resulting in a deletion of one repeat region and genes within the direct repeats.  
  
[[Image:deletion.png|thumb|500px|center| Image taken from[http://www.biology.ucsd.edu/classes/old.web.classes/bimm100.FA00/09/MobileElements.html#B] ]]
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[[Image:deletion.png|thumb|500px|center| Image taken from[http://www.biology.ucsd.edu/classes/old.web.classes/bimm100.FA00/09.MobileElements.html#B] ]]

Latest revision as of 16:28, 12 November 2009

Deletion of a DNA segment can happen if it is bordered by direct repeats. These repeats can be introduced by insertion of same transposons in identical orientation. DNA will fold back in a closed loop structure with direct repeats positioned in a way two homologous chromosomes aligned in metaphase. This structure of DNA allows recombination to happen between two repeats resulting in a deletion of one repeat region and genes within the direct repeats.

Image taken from[1]