http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. The Stowers Institute's Baumann Lab has demonstrated how human cells protect chromosome ends from misguided repairs that can lead to cancer. The work, published in The EMBO Journal, a publication of the European Molecular Biology Organization, follows the team's 2007 in vitro demonstration of the role of the hRAP1 protein in preventing chromosome ends from being fused to new DNA breaks. http://www.physorg.com/news172419402.html Medicine & Health Thu, 17 Sep 2009 15:30:01 EST news172419402 Scientists have long suspected that the sex chromosome that only males carry is deteriorating and could disappear entirely within a few million years, but until now, no one has understood the evolutionary processes that control this chromosome's demise. http://www.physorg.com/news167026463.html Biology Fri, 17 Jul 2009 05:15:21 EST news167026463 (PhysOrg.com) -- In the week that the University of Leicester celebrates the 25th anniversary of the discovery of DNA fingerprinting (Thursday September 10) new findings from the world-renowned University of Leicester Department of Genetics reveal for the first time that the male and female do truly communicate -- at least at the fundamental genetic level. http://www.physorg.com/news171707200.html Medicine & Health Wed, 09 Sep 2009 19:00:01 EST news171707200 The unique mechanism behind the evolutionary survival of the human Y chromosome may also be responsible for a range of sex disorders, from failed sperm production to sex reversal to Turner Syndrome. http://www.physorg.com/news171203686.html Medicine & Health Thu, 03 Sep 2009 13:39:25 EST news171203686 Cornell researchers have discovered a genetic mechanism in fruit flies that prevents two closely related species from reproducing, a finding that offers clues to how species evolve. http://www.physorg.com/news175808117.html Biology Mon, 26 Oct 2009 21:20:02 EST news175808117 Because females carry two copies of the X chromosome to males' one X and one Y, they harbor a potentially toxic double dose of the over 1000 genes that reside on the X chromosome. http://www.physorg.com/news165675004.html Medicine & Health Wed, 01 Jul 2009 14:40:02 EST news165675004 (PhysOrg.com) -- Move over, Y chromosome - it's time X got some attention. In the first evolutionary study of the chromosome associated with being female, University of California, Berkeley, biologist Doris Bachtrog and her colleagues show that the history of the X chromosome is every bit as interesting as the much-studied, male-determining Y chromosome, and offers important clues to the origins and benefits of sexual reproduction. http://www.physorg.com/news159105336.html Biology Thu, 16 Apr 2009 12:56:19 EST news159105336 Researchers have discovered a new explanation for differences in the severity of mental illness in males. The more excess copies of a certain gene, the more serious the handicap. The genetic defect is situated on the X-chromosome; and it is suspected that it is the amount of copies of the GDI1 gene that is responsible. The results are being published in the American Journal of Human Genetics, and are the result of work by the group of Guy Froyen connected to VIB, a life sciences research institute in Flanders, Belgium at the University of Leuven, in close collaboration with Hilde Van Esch of the Center for Human Genetics (University Hospital Leuven) and colleagues in Germany and Spain. http://www.physorg.com/news179673953.html Medicine & Health Thu, 10 Dec 2009 13:31:58 EST news179673953 Pinpointing the genes involved in human brain cancer can be like looking for a needle in a haystack, and sometimes the needle you find may not be the right one. By comparing human and canine genomes, researchers at North Carolina State University have discovered that a gene commonly believed to be involved in meningiomas-tumors that affect the meninges, or thin covering, of the human brain and account for one out of four adult brain tumors -may not be as key for tumor formation as previously thought, and they've narrowed the search for the real culprit. http://www.physorg.com/news166105992.html Medicine & Health Mon, 06 Jul 2009 13:33:47 EST news166105992 Genetic variants in a region on chromosome 9q may influence asthma development in Mexican children, according to research published in the August 28 issue of the open-access journal PLoS Genetics. http://www.physorg.com/news170673072.html Medicine & Health Fri, 28 Aug 2009 10:30:01 EST news170673072 (PhysOrg.com) -- K-fibers, structures long thought to play a key role in the alignment of chromosomes prior to cell division, are not required after all, say Indiana University and New York State Department of Health scientists. http://www.physorg.com/news166113443.html Biology Mon, 06 Jul 2009 16:10:01 EST news166113443 The Stowers Institute's Gerton Lab has provided new evidence to clarify the structure of nucleosomes containing Cse4, a centromere-specific histone protein required for proper kinetochore function, which plays a critical role in the process of mitosis. The work, conducted in yeast cells, was published in the most recent issue of Molecular Cell. http://www.physorg.com/news173366310.html Biology Mon, 28 Sep 2009 14:19:39 EST news173366310 (PhysOrg.com) -- Wageningen geneticists (The Netherlands) are developing a method to replicate the parents of a chosen plant. Known as 'reverse breeding', this will have a big impact for the breeding industry. http://www.physorg.com/news180120006.html Biology Tue, 15 Dec 2009 17:40:04 EST news180120006 Dutch researchers have found the first evidence that a process of inactivating the X chromosome during embryo development and implantation, which was known to occur in mice but unknown in humans, does, in fact, take place in human female embryos prior to implantation in the womb. http://www.physorg.com/news165489911.html Medicine & Health Mon, 29 Jun 2009 12:30:02 EST news165489911 A common weed and human cancer cells could provide some very uncommon details about DNA structure and its relationship with telomeres and how they affect cellular aging and cancer, according to a team led by scientists from Texas A&M University and the University of Cincinnati. http://www.physorg.com/news175791796.html Chemistry Mon, 26 Oct 2009 16:20:01 EST news175791796