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Concerted evolution of repetitive DNA sequences in eukaryotes
1Department of Biology, University of North Dakota Grand Forks 58202, USA.
The Quarterly Review of Biology
|September 1, 1995
Summary
Concerted evolution drives the homogenization of repetitive DNA sequences within species. This process, known as molecular drive, significantly impacts population differentiation and species discrimination.
Area of Science:
- Genomics
- Evolutionary Biology
- Molecular Genetics
Background:
- Eukaryotic genomes contain large fractions of repetitive DNA sequences with copy numbers ranging from thousands to millions.
- Repetitive DNA sequences exhibit patterns of concerted evolution, leading to greater sequence similarity within species than among them.
Purpose of the Study:
- To demonstrate the potential importance of concerted evolution mechanisms in population differentiation.
- To explore the implications of concerted evolution for discriminating natural populations.
Main Methods:
- Review of existing literature on concerted evolution and molecular drive.
- Analysis of the evolutionary population dynamics of repetitive DNA sequences.
Main Results:
- Concerted evolution, driven by molecular drive, results in intraspecific homogenization of repetitive DNA arrays.
- Any reproductively isolated population with limited gene flow can exhibit concerted evolution of repetitive DNA.
Conclusions:
- Concerted evolution of repetitive DNA has significant implications for population differentiation and species discrimination.
- These mechanisms apply to both coding (protein, RNA) and non-coding ("junk") DNA, highlighting their broad impact.