ISSN:
1573-9309
Keywords:
genome evolution
;
repeated sequences
;
introns
Source:
Springer Online Journal Archives 1860-2000
Topics:
Natural Sciences in General
,
Technology
Notes:
Abstract Because the origin of repeated sequences may date back to the appearance of the first genes and genomes on Earth, they must have been involved in the entire history of genome evolution. Repeated sequences are important components of the primitive genomes that would provide the basis for the origin of split genes. In this sense, introns existed in early genes, and both repeated sequences and introns have always had structural and evolutionary roles. The evolution of the composition of organic genomes may be unified in a general pattern. Nuclear (nucleoid) genomes, mitochondrial genomes, and chloroplast genomes would respectively have evolved according to two scenarios. The ‘small genome’ scenario would be evolutionary paths in which repeated sequences and introns have been lost, while the ‘large genome’ scenario would be evolutionary paths in which repeated sequences and introns have been retained and developed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1005345510588
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