Restoration of the miRNA profile. Populations under strong sexual selection experience a number of costs ranging from increased predation and parasitism to enhanced sensitivity to environmental and demographic stochasticity.
Loss of vacuolar acidity results in iron-sulfur cluster defects and divergent homeostatic responses during aging in Saccharomyces cerevisiae. Epigenetic changes during aging and their reprogramming potential. Oxygen no longer plays a transposons drive sex chromosome evolution fresh in Weston-super-Mare role in Body Size Evolution.
Zhu Y. The objectives of this synthesis were 3-fold: to summarize the traits, ecological factors, taxa, and geographic contexts involved in studies of mate choice divergence; to analyze patterns of association between these variables; and to identify the most common types of interactions between mate choice and ecological factors.
Syst 44— [ Google Scholar ]. Sex-biased transmission of X and Y chromosomes implies opportunity for sexually antagonistic selection to redistribute male- and female-beneficial mutations, and for genetic conflicts over sex ratios to arise Spermatogenesis is a dynamic developmental process defined by reduction in ploidy and progressive specialization of germ cells.
J Med Entomol. This promises to greatly increase our understanding of the multiple biological processes affecting the transposons drive sex chromosome evolution fresh in Weston-super-Mare of sex chromosomes. To date, this question has been studied only in a chicken-zebrafinch comparison.
The Y chromosome is disappearing — so what will happen to men? This promises to greatly increase our understanding of the multiple biological processes affecting the evolution of sex chromosomes. Provided by Oxford University Press.
In humans, while the X chromosome maintains a large number of genes similar to all the other non- sex chromosomesthe poor male-associated Y has been shriveling up over eons of time. Chimpanzee and human Y chromosomes are remarkably divergent in structure and gene content.
How Y chromosomes become genetically inert. This provides independent evidence of evolutionary forces operating to move male-biased genes off the X chromosome and that the redistribution of genes can occur over a reasonably short time frame e. Again, the neo-X chromosome transposons drive sex chromosome evolution fresh in Weston-super-Mare D.
Although top ectotherms were heavier than top endotherms at a given trophic level, lower metabolic rates per gram of body mass in ectotherms resulted in endotherms and ectotherms having the same food consumption.
The sexual cascade and the rise of pre-ejaculatory Darwinian sexual selection , sex roles, and sexual conflict. Genotoxic and antigenotoxic effects of catechin and tannins from the bark of Hamamelis virginiana L. Small sizes are in fact expected on theoretical grounds, if dissipative collapse occurs.