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. 2015 Apr 2;17:8. doi: 10.1186/s12575-015-0020-z

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© Mohanta and Bae; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Role of different forces affecting the evolution of genome size. The major important factors are transposable elements (TEs), short sequence repeats, microsatellites, genome duplication and others. The mutational and selection pressure plays a significant role in this process. The negligible selective effects governed by genetic drift also contribute for the evolution of genome size. Overall all the forces play a role towards the increase in genome size at different levels. The photograph is adapted according to the report of Petrov [37].