Polyploidy as mechanism of speciation in plants

Sesartić, Marko (2014) Polyploidy as mechanism of speciation in plants. Bachelor's thesis, Faculty of Science > Department of Biology.

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Abstract

Polyploidization is an evolutionary process where two genomes are combined in one nucleus, it represents one of the most dramatic mutations know to occur. Nevertheless, polyploidy is well tolerated in many groups of eukaryotes. Genome duplication can reduce the risk of extinction through several means: by functional redundancy, mutational robustness, and increased rates of evolution and adaptation. Genome duplication is often followed by increased rates of evolution and directional selection on some genes. Although a link between any specific genome duplication event and increased species diversity remains correlational rather than causal. It may prove difficult to determinate whether polyploidy enabled organisms to survive extinctions or whether polyploidy facilitated evolutionary transitions and increased biological complexity.

Item Type: Thesis (Bachelor's thesis)
Supervisor: Besendorfer, Višnja
Date: 2014
Number of Pages: 11
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 09 Apr 2014 08:08
Last Modified: 23 Sep 2014 10:10
URI: http://digre.pmf.unizg.hr/id/eprint/794

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