Genetic Recombination and Molecular Evolution
نویسندگان
چکیده
منابع مشابه
Genetic recombination and molecular evolution.
Reduced rates of genetic recombination are often associated with reduced genetic variability and levels of adaptation. Several different evolutionary processes, collectively known as Hill-Robertson (HR) effects, have been proposed as causes of these correlates of recombination. Here, we use DNA sequence polymorphism and divergence data from the noncrossing over dot chromosome of Drosophila to d...
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Symmetry considerations of proteinnucleic acid interaction suggest the existence of an alternate branched configuration for DNA induced by binding specific structural proteins to symmetrically arranged polynucleotide base sequences. The concept that such sequences exist at the ends of genes or operons leads to a molecular model for genetic recombination in eukaryotic cells.
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HE past few decades have witnessed the successive description in biochemiTcal-or “molecular”-terms of the great formal entities of classical genetics. The lickage group was early identified with the objectively seen chromosome, then the gene itself, in its wild and mutant forms, more and more closely related to the linear DNA regions thereof. We have seen the identification of the gene product ...
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The rate of genetic recombination varies among species, and across different regions of the genome within a species. In the extreme case, all genes in an asexual or selffertilizing species are effectively completely linked, in contrast to the substantial opportunities for recombination in outbreeding sexual species. Several key observations on the relation between patterns of evolution and leve...
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Turnip mosaic virus (TuMV), a species of the genus Potyvirus, occurs worldwide. Seventy-six isolates of TuMV were collected from around the world, mostly from Brassica and Raphanus crops, but also from several non-brassica species. Host tests grouped the isolates into one or other of two pathotypes; Brassica (B) and Brassica-Raphanus (BR). The nucleotide sequences of the first protein (P1) and ...
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ژورنال
عنوان ژورنال: Cold Spring Harbor Symposia on Quantitative Biology
سال: 2009
ISSN: 0091-7451,1943-4456
DOI: 10.1101/sqb.2009.74.015