The evolution of sex-biased genes and sex-biased gene expression

被引：0
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作者：
Hans Ellegren
John Parsch
机构：
[1] Uppsala University,Department of Evolutionary Biology
[2] Norbyvägen 18D,Department of Biology II
[3] Section of Evolutionary Biology,undefined
[4] University of Munich (LMU),undefined
来源：
Nature Reviews Genetics | 2007年 / 8卷
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摘要：
Sexual dimorphism in gene expression is widespread across organisms and genomes.Genes with sex-biased expression, especially those with male-biased expression, tend to evolve rapidly in both protein sequence and expression level.Sex-biased genes are non-randomly distributed in the genome, with examples of both under-representation and over-representation on the X chromosome.There is mounting evidence that positive selection is the driving force behind the rapid evolution of sex-biased genes. This is probably caused by sexual selection and antagonistic coevolution between the sexes.Sex-linked genes that escape dosage compensation constitute a special case of sex-biased gene expression.There are several scenarios for the origin of sex-biased genes, including single-locus antagonism, sexual antagonism plus gene duplication and duplication of sex-biased genes.
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页码：689 / 698
页数：9
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