Evolution of multigene families under interchromosomal gene conversion.
نویسندگان
چکیده
منابع مشابه
The evolution of multigene families under intrachromosomal gene conversion.
A model for the evolution of the probabilities of genetic identity within and between loci of a multigene family in a finite population is formulated and investigated. Unbiased intrachromosomal gene conversion, equal crossing over between tandemly repeated genes, random genetic drift and mutation to new alleles are incorporated. Generations are discrete and nonoverlapping; the diploid, monoecio...
متن کاملGene conversion, linkage, and the evolution of multigene families.
The evolution of the probabilities of genetic identity within and between the loci of a multigene family is investigated. Unbiased gene conversion, equal crossing over, random genetic drift, and mutation to new alleles are incorporated. Generations are discrete and nonoverlapping; the diploid, monoecious population mates at random. The linkage map is arbitrary, and the location dependence of th...
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We now know a lot about the dynamics of nucleotide substitutions within existing genes, but we’ve neglected one key component of molecular evolution. We haven’t talked about where new genes come from. It’s important to understand this phenomenon because, after all, new metabolic functions are likely to arise only when there are new genes that can perform them. It’s not likely that an existing g...
متن کاملSome models of gene conversion for treating the evolution of multigene families.
A simple model of gene conversion presented earlier has been compared with a more general model under the assumption of no bias. The former is based on a simple concept that, by conversion, a gene (or a segment of a gene) is transferred from one locus to another in a multigene family. Intrachromatid symmetric conversion may result in reciprocal exchange of genes within a multigene family, and t...
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Groups of genes showing similarity with each other are referred to as a gene family, arising from wholesale or partial gene duplication. The clustering of functionally related members of a gene family reflects their common ancestry and subsequent duplication and divergence. It has been speculated that gene duplication is essential for the creation of major evolutionary novelty. Genome projects ...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1984
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.81.12.3796