منابع مشابه
Sexually 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 کاملBax and Sexually Dimorphic Motoneuron Death
In usual parlance, “action potential” is synonymous with all-or-none, with each event a uniform shape. In this view, the large, but brief, membrane conductance change associated with an action potential momentarily shunts incoming synaptic charge and thus “resets” the membrane, as depicted in simple “integrate and fire” neuronal models. However, as de Polavieja et al. show this week, the conduc...
متن کاملEvolution of sexually dimorphic longevity in humans
Why do humans live longer than other higher primates? Why do women live longer than men? What is the significance of the menopause? Answers to these questions may be sought by reference to the mechanisms by which human aging might have evolved. Here, an evolutionary hypothesis is presented that could answer all three questions, based on the following suppositions. First, that the evolution of i...
متن کاملHow Sexually Dimorphic Are Human Mate Preferences?
Previous studies on sex-differentiated mate preferences have focused on univariate analyses. However, because mate selection is inherently multidimensional, a multivariate analysis more appropriately measures sex differences in mate preferences. We used the Mahalanobis distance (D) and logistic regression to investigate sex differences in mate preferences with data secured from participants res...
متن کاملDevelopmental basis of sexually dimorphic digit ratios.
Males and females generally have different finger proportions. In males, digit 2 is shorter than digit 4, but in females digit 2 is the same length or longer than digit 4. The second- to fourth-digit (2D:4D) ratio correlates with numerous sexually dimorphic behavioral and physiological conditions. Although correlational studies suggest that digit ratios reflect prenatal exposure to androgen, th...
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ژورنال
عنوان ژورنال: Nature Genetics
سال: 2011
ISSN: 1061-4036,1546-1718
DOI: 10.1038/ng.965