Category: Uncategorized

SELECTION FAVORED. "Sex chromosomes can evolve in several different ways, and that recombination suppression is favoured when genes are involved that interact with sex with respect to their effects on fitness." https://lnkd.in/gCh5RAX View in LinkedIn

FAVORED LINKAGE. "Translocations or centric fusions involving an autosome and a sex chromosome could also create linkage between sexually antagonistic genes and the sex chromosomes, and hence be favoured by natural selection." http://www.nature.com/hdy/journal/v95/n2/full/6800697a.html View in LinkedIn

RECOMBINATION SUPPRESSION. "The fact that this evolutionary change occurs repeatedly suggests that recombination suppression between the sex chromosomes was actively favoured by selection, rather than being a consequence of rearrangements such as occasionally occur on all chromosomes." http://www.nature.com/hdy/journal/v95/n2/full/6800697a.html View in LinkedIn

NO RECOMBINATION OF SEX CHROMOSOMES. "Whatever the mechanism, loss of X–Y recombination has occurred in different taxa, including repeated events in different fairly closely related lineages of birds and insects (Drosophila and mosquitoes, which have different sex chromosome gene content." http://www.nature.com/hdy/journal/v95/n2/full/6800697a.html View in LinkedIn

STEPWISE EVOLUTION. "Throughout mammalian evolution, recombination between the two sex chromosomes was suppressed in a stepwise manner. It is thought that the suppression of recombination led to an accumulation of deleterious mutations and frequent genomic rearrangements on the Y chromosome." https://lnkd.in/d5x7tBt View in LinkedIn

SPREAD BY CREEP. "Can recombination decrease without chromosome rearrangements, just by spread of recombination modifiers with small effects?" http://www.nature.com/hdy/journal/v95/n2/full/6800697a.html View in LinkedIn

FRAGMENT FROM NATURE meditates on the significant shift from the concept of pathogen to that of the pathobiome. This is not just a conceptual issue, but has many practical implications. It is in line with a change in thinking from the “war on germs” to the idea that we are composed of an interacting community of microbes, the microbiome, and that health is related to the balance of the helpful microbes versus the pathological microbes, rather than an antibiotic-fueled scorched-earth policy that kills all of these players. View in LinkedIn

Astronomers find half of the missing matter in the universe https://www.theguardian.com/science/2017/oct/12/astronomers-find-half-of-the-missing-matter-in-the-universe?CMP=Share_iOSApp_Other View in LinkedIn

REPETITIVE DNA. "Given that the stickleback and papaya male-specific regions have accumulated repetitive DNA, they may have been isolated from recombination with X-linked homologues for quite long times. Divergence data for synonymous sites within coding sequences should help to estimate the time scales." http://www.nature.com/hdy/journal/v95/n2/full/6800697a.html View in LinkedIn

YOUNG SEX CHROMOSOMES. "In recently evolved sex chromosomes, degeneration is probably much slower than in neo-Y chromosomes. There is less opportunity for selection to cause reduced effective population sizes of Y- or W-specific genes, since only loci within the sex-specific region are probably relevant." http://www.nature.com/hdy/journal/v95/n2/full/6800697a.html View in LinkedIn