منابع مشابه
Heterospecific interactions and the proliferation of sexually dimorphic traits.
Sexual selection is expected to promote speciation by fostering the evolution of sexual traits that minimize reproductive interactions among existing or incipient species. In species that compete for access to, or attention of, females, sexual selection fosters more elaborate traits in males compared to females. If these traits also minimize reproductive interactions with heterospecifics, then ...
متن کاملAllometry and sexually dimorphic traits in male anurans.
Allometry of secondary sexual traits has been the subject of recent debate, and the generality of positive allometry and its association with sexual selection have been recently questioned. Whereas some studies suggest an almost universal positive allometry for traits under sexual selection and isometry or a negative allometry for traits not under such pressure, other studies argue that this pa...
متن کاملSexually antagonistic epigenetic marks that canalize sexually dimorphic development.
The sexes share the same autosomal genomes, yet sexual dimorphism is common due to sex-specific gene expression. When present, XX and XY karyotypes trigger alternate regulatory cascades that determine sex-specific gene expression profiles. In mammals, secretion of testosterone (T) by the testes during foetal development is the master switch influencing the gene expression pathways (male vs. fem...
متن کاملEarly experience affects the traits of monogamy in a sexually dimorphic manner.
The goal of this study was to examine the effects of early life experiences on the subsequent expression of traits characteristic of social monogamy in prairie voles (Microtus ochrogaster). During cage changes parents and their offspring were either transferred between cages in a cup (zero manipulation, MAN0) or with a gloved hand (one manipulation, MAN1). Following weaning the offspring were t...
متن کاملQuantitative trait loci responsible for variation in sexually dimorphic traits in Drosophila melanogaster.
To understand the mechanisms of morphological evolution and species divergence, it is essential to elucidate the genetic basis of variation in natural populations. Sexually dimorphic characters, which evolve rapidly both within and among species, present attractive models for addressing these questions. In this report, we map quantitative trait loci (QTL) responsible for variation in sexually d...
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ژورنال
عنوان ژورنال: Nature Reviews Genetics
سال: 2013
ISSN: 1471-0056,1471-0064
DOI: 10.1038/nrg3545