May 13, 2009

Are sex-biased genes more dispensable?

Biology Letters
Judith E Mank, Hans Ellegren

Abstract

Many genes show different expression levels in males and females, and these form the basis of sexually dimorphic phenotypes. Sex-biased genes experience accelerated rates of protein evolution, which has been attributed to sexual selection. However, it is possible that the increased rates of molecular evolution, and more importantly the sex-biased gene expression pattern itself, are due to decreased selective constraint. This notion may explain many of the patterns associated with sex-biased gene expression, and changes how we should view the role of natural and sexual selection in relation to these genes.

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Citations

Mentioned in this Paper

Reproduction
Gene Expression
Genomics
Evolution, Molecular
Biological Evolution

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