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Under Microscope - Home. PAX6 Gene - GeneCards. Gene in genomic location according to Ensembl data Experimental tissue vectors: Duplicate measurements were obtained for twelve normal human tissues hybridized against Affymetrix GeneChips HG-U95A-E.
The intensity values (shown on the y-axis) were normalized and drawn on a novel scale, which is an intermediate between log and linear scales. This enables displaying several orders of magnitude on the same graph, while emphasizing the differences between them. Noise was not subtracted out, so values below 10 may be suspect. Further, each probeset's expression profile was converted into binary form when possible. Mike Luckovich. Drosophila Genes. The comprehensive characterization of homeodomain DNA-binding specificities is described for Drosophila melanogaster.
The analysis of all 84 independent homeodomains from Drosophila reveals the breadth of DNA sequences that can be specified by the homeodomain. The majority of these factors can be organized into 11 different specificity groups, where the preferred recognition sequence between these groups can differ at up to four of the six core recognition positions. Analysis of the recognition motifs within these groups led to a catalog of common specificity determinants that may cooperate or compete to define the binding site preference.
With these recognition principles, a homeodomain can be reengineered to create factors where its specificity is altered at the majority of recognition positions. Udacity - Educating the 21st Century. Merenbey: Bir doğal seçilim sürprizi...
The Evolution of Antibiotic Resistance: Insight into the Roles of Molecular Mechanisms of Resistance and Treatment Context - - R. Craig MacLean - Discovery Medicine. Abstract: The widespread use of antibiotics has markedly improved public health over the last 60 years.
However, the efficacy of antibiotic treatment is rapidly decreasing as a result of the continual spread of antibiotic resistance in pathogen populations. The evolution of antibiotic resistance is an amazingly simple example of adaptation by natural selection, and there is growing interest among evolutionary biologists in using evolutionary principles to help understand and combat the spread of resistance in pathogen populations. In this article, we review recent progress in our understanding of the underlying evolutionary forces that drive antibiotic resistance. Recent work has shown that both the mechanisms of antibiotic action and resistance, as well as the treatment context in which resistance evolves, influence the evolution of resistance in predictable ways. Prehistoric bear skulls found underwater in Mexico. 2011: The 9th hottest year on record. Trees Cocooned in Webs After Flood. Photograph courtesy Russell Watkins, U.K. Department for International Development Trees shrouded in ghostly cocoons line the edges of a submerged farm field in the Pakistani village of Sindh, where 2010's massive floods drove millions of spiders and possibly other insects into the trees to spin their webs.
Beginning last July, unprecedented monsoons dropped nearly ten years' worth of rainfall on Pakistan in one week, swelling the country's rivers. The water was slow to recede, creating vast pools of stagnant water across the countryside. Fast Track to Gene Annotation and Genome Analysis - DNA Subway. Fast Track to Gene Annotation and Genome Analysis - DNA Subway.
Apoptoz Is. Ken Miller on Intelligent Design. Big Think. TED. Event: Apes or Angels: What is the Origin of Ethics? The Lorne Trottier Public Science Symposium. MathOverflow. Nanoreisen - Abenteuer hinterm Komma. Becoming Human. Blogroll. Free reference manager and PDF organizer.
Genome Research Points to Adaptation Among Early African-Americans. BLAT - A Powerful Genetic Search Tool. Links. Tree of Life interactive. Alpha: Computational Knowledge Engine. Wrestling ninjas – why sabre-toothed predators have massive arms. A cat-like animal explodes from the long grass and leaps onto an antelope.
Its huge bulk drags the target to the ground and its muscled forelegs pin it down. With two long sabre-shaped canine teeth, it stabs its victim in the throat, just the once, severing its blood vessels and windpipe. Death comes quickly. The hunter could be Smilodon, a sabre-toothed cat that lived throughout North and South America, around one or two million years ago.
Or, it could be a nimravid, another group of hunters that looked like cats, but belonged to a separate, closely-related family. BioVisions. iBioSeminars: Free biology videos online. Yılın kitabı Türkiye'den - Doğal Hayat. Güncelleme: 09:45 TSİ 02 Ocak. 2012 Pazartesi KuzeyDoğa Derneği Başkanı Doç.
Dr. Dr. Ömer Gökçümen ile evrimin genetiği üzerine. Açık Bilim Cepyayını’nın ikincisini, evrim genetiği üzerinde çalışan Dr.
Ömer Gökçümen ile yaptık. Abstract search. A Decade of Discovery. A Touch of Understanding: Gene Tweak Opens Sensory Black Box. A new technique for color-coding nerves involved in touch gives neuroscientists a much-needed tool for studying that mysterious sense.
For nearly 250 years, the intricate detail and complexity of skin’s nervous-system wiring has thwarted attempts at understanding it. But if researchers studying skin could be imagined as technicians reverse-engineering a supercomputer’s peripherals, they’d have just traced about four lines back to the motherboard. “Of all five major senses, the skin sense is the least understood. 3 Billion-Year-Old Sulfur-Eating Microbes May Be the Oldest Fossils Ever Found. Resurrecting Evolution to Solve an 800-Million-Year-Old Puzzle. This is a story of about how the parts of a puzzle locked into place 800 million years ago.
The puzzle is an ion pump that you can find in any mushroom, mold, or yeast. Giant Galapagos tortoise extinct for 150 years might still be alive. Giant Galapagos Tortoises in Isabela Island, Galapagos.
Adults of large subspecies can weigh over 300 kilograms (660lb) and measure 1.2 meters (4 ft) long. Although the maximum life expectancy of a wild tortoise is unknown, the average life expectancy is estimated to be 200 years. A subspecies of the the giant Galapagos tortoise, Chelonoidis elephantopus, long thought to be extinct for more than 150 years, is now believed to might still exist, scientists say. Chinese fossils shed light on the evolutionary origin of animals from single-cell ancestors.
Posted by TANNChina, Evolution, Fossils, Origin of Life, Palaeontology1:00 PM Evidence of the single-celled ancestors of animals, dating from the interval in Earth's history just before multicellular animals appeared, has been discovered in 570 million-year-old rocks from South China by researchers from the University of Bristol, the Swedish Museum of Natural History, the Paul Scherrer Institut and the Chinese Academy of Geological Sciences.
All life evolved from a single-celled universal common ancestor, and at various times in Earth history, single-celled organisms threw their lot in with each other to become larger and multicellular, resulting, for instance, in the riotous diversity of animals. However, fossil evidence of these major evolutionary transitions is extremely rare. Neanderthals, Humans Interbred—First Solid DNA Evidence. The next time you're tempted to call some oaf a Neanderthal, you might want to take a look in the mirror. According to a new DNA study, most humans have a little Neanderthal in them—at least 1 to 4 percent of a person's genetic makeup. The study uncovered the first solid genetic evidence that "modern" humans—or Homo sapiens—interbred with their Neanderthal neighbors, who mysteriously died out about 30,000 years ago.
What's more, the Neanderthal-modern human mating apparently took place in the Middle East, shortly after modern humans had left Africa, not in Europe—as has long been suspected. "We can now say that, in all probability, there was gene flow from Neanderthals to modern humans," lead study author Ed Green of the University of California, Santa Cruz, said in a prepared statement.
"They've finally seen the light ... because it's been obvious to many us that this happened," said Trinkaus, of Washington University in St. Cold Spring Harbor Laboratory. The Cell: An Image Library - Image CIL:214. High genetic diversity in an ancient Hawaiian clone. Telomere length in birds predicts longevity. Protective caps known as telomeres that help to preserve the integrity of chromosomes can also predict lifespan in young zebra finches (Taeniopygia guttata), researchers have found.
Telomeres are stretches of repetitive DNA sequence that are found at the ends of chromosomes, where they help to maintain cell viability by preventing the fraying of DNA and the fusion of one chromosome to another. The relationship between normal ageing and telomere decline has long been suspected — and even asserted by some companies that measure customers’ telomere length — but the link remains unproven in humans (see 'Spit test offers guide to health'). P. Jerem The lifespan of zebra finches is strongly correlated with the length of the chromosome caps that protect their DNA, known as telomeres, particularly at 25 days old.
Return of the super ants. An entire genus of ants, comprising more than 1,000 species, has been found to have a hidden ability to make 'supersoldiers' — larger-than-average soldier ants that defend the nest against invaders. And all it takes is a dab of hormone. A few ant species of the Pheidole genus were already known to produce supersoldiers that deter invading army ants by blocking nest entrances with their enormous heads. Scientists have only ever seen these supersoldiers in 8 out of 1,100 Pheidole species. But a new study now makes it clear that the entire genus has the potential to create this subset of the generic worker caste. Fossils Reveal Secrets of Insects' Weird Ears. Various species of insects boast ears in the strangest places, including on their necks and under their wings. Now, a new examination of 50-million-year-old cricket and katydid fossils finds that these odd ears evolved before even the appearance of the predators that these ears can hear.
Crickets, moths and other flying insects can hear the ultra high-pitched sonar of hunting bats, a talent that helps them avoid being eaten. Researchers suspected that the appearance of bats on the scene triggered the evolution of these sensitive ears. But the new research reveals that crickets and katydids had modern ears 50 million years ago, before echolocating bats evolved. An Error Occurred Setting Your User Cookie. This site uses cookies to improve performance. If your browser does not accept cookies, you cannot view this site. Setting Your Browser to Accept Cookies There are many reasons why a cookie could not be set correctly. Below are the most common reasons: You have cookies disabled in your browser. Charles Darwin - Adrian Desmond - %30 indirimli. Charles Robert Darwin (1809 - 1882), Cambridge'deki ilahiyat eğitimini başarıyla tamamladıktan sonra "ıssızlığın ortasında bir taşra papazı" olarak ömrünü sükûnet içinde geçirme hayalleri kurarken, küçüklüğünden beri doğa bilimlerine olan merakının da etkisiyle, dünyayı dolaşarak ölçümler yapmak, haritalar çıkarmak, bilimsel keşif ve incelemelerde bulunmak amacıyla Beagle gemisiyle düzenlenen keşif seferine katıldı.
Evolution: Education and Outreach - Free Access Available. Evolver Zone. Centre of the Cell. F1000 - Post-publication peer review of the biomedical literature. Free conservation biology textbook: Conservation Biology for All. Gravity. Supersoldier Ants Reveal Evolutionary Secret. When eight bizarrely big-headed soldier ants turned up in a wild colony collected from Long Island, N.Y., scientists knew they had found something interesting. Hairy Museum of Natural History. Human Family Tree. Interactive Concepts in Biochemistry - Interactive Animations. Labome.Org - Biomedical Knowledge Organization. 570-Million-Year-Old Fossils Hint at Origins of Animal Kingdom. Before DNA, before RNA: Life in the hodge-podge world - life - 08 January 2012. Take note, DNA and RNA: it's not all about you. Welcome to Flow in Games.
3D Human Anatomy. Timeline: The evolution of life - life - 14 July 2009. Read full article. The Timescale of Life. The Scale of the Universe - StumbleUpon. The Gene Ontology. SoundVision Productions Presents The DNA Files. Carroll lab. Tramem. The Unofficial Stephen Jay Gould Archive. Scirus - for scientific information.
Center for Developmental Biology. 理化学研究所. Celebrating 50,000 Generations of the Long Term Lines. Front row: Ryan Quick, Chris Strelloff, and Brian Baer Standing: Justin Meyer, Jeff Barrick, Christian Orlic, James Dittmar, RohanMaddamsetti, Caroline Turner, Brian Wade, Mike Wiser, Neerja Hajela, Richard Lenski, Devin Dobias In Back: Zachary Blount.
rEvolution - online games for biology students. Powers of Ten. Based on the film by Charles and Ray Eames. An Eames Office Website. Popular Science - Google Kitaplar. Www.naturepl.com - Natural History, Wildlife and Plant Photograph Sales. Media: The Annual Evolution Symposium. sScienceMap. Mantık hataları: top 10 « no dry light. Evolution.tr. Evidence: How Do We Know What We Know? Chaîne de ibioseminars. Tree of Life Web Project. Ana Sayfa - Evrimi Anlamak. “Kriptografi Gördüm”, Wunjo… » ABD Doktora Programları SSS. Bilim Feneri. Apoptoz Is.
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