Science. Des animaux deviennent nocturnes pour éviter les hommes. De nombreux animaux diurnes se sont mis à sortir la nuit afin d’éviter de croiser des humains.
Leurs caractéristiques physiques pourraient en être changées. Il y a quelques années, Kaitlyn Gaynor et son équipe ont remarqué un phénomène étonnant. Tout a commencé avec des données venues de Tanzanie, où des caméras équipées de détecteurs de mouvement avaient repéré un nouveau schéma de comportement : des antilopes qui jusque-là se déplaçaient principalement la journée s’étaient mises à le faire surtout de nuit. Après discussion, la chercheuse, alors doctorante à l’université de Californie à Berkeley, et ses collègues se sont rendu compte qu’un changement de rythme semblable s’était produit chez de nombreux autres mammifères. Au Mozambique, des éléphants avaient commencé à parcourir les routes dans l’obscurité, à un moment où ils étaient assurés de ne pas croiser trop d’êtres humains, pour au contraire rester dans la forêt la journée. William Brennan.
Scientific Method vs. Creationist Method. Evolution vs Natural Selection. In World First, Monkeys Cloned Like Dolly the Sheep. The years-long effort, led by Chinese Academy of Sciences postdoctoral fellow Zhen Liu, culminated in the recent birth of two female macaques, Zhong Zhong and Hua Hua.
The macaques’ names are drawn from the word zhonghua, an adjective for the Chinese people. The two macaques—eight weeks and six weeks old—are genetically identical, both clones of the same donor culture of fetal monkey cells. Genetically modified babies given go ahead by UK ethics body. The creation of babies whose DNA has been altered to give them what parents perceive to be the best chances in life has received a cautious green light in a landmark report from a leading UK ethics body.
The Nuffield Council on Bioethics said that changing the DNA of a human embryo could be “morally permissible” if it was in the future child’s interests and did not add to the kinds of inequalities that already divide society. The report does not call for a change in UK law to permit genetically altered babies, but instead urges research into the safety and effectiveness of the approach, its societal impact, and a widespread debate of its implications. “It is our view that genome editing is not morally unacceptable in itself,” said Karen Yeung, chair of the Nuffield working group and professor of law, ethics and informatics at the University of Birmingham. “There is no reason to rule it out in principle.”
GATTACA. Henrietta Lacks: Her DNA fueled medical breakthroughs. Scientists alter DNA to cure blood disorder in embryo. Diagnosing and Treating Genetic Diseases - A Revolution in Progress: Human Genetics and Medical Research. When you know the genetic mutations that cause a disease, you may be able to intervene to lessen the disease’s effects.
And you may also be able to develop genetic tests for the mutations so that people can learn if they are more likely to develop a disease, or if they are carriers of the trait and may pass it on to their children. Searching for the genes involved in a genetic disease involves discovering which gene has been mutated and how it has been mutated. Because there may be more than one mutation in a gene which can cause a genetic disease, the search is often long. To intervene in the disease, you have to know what the gene is supposed to do, and what it isn’t doing.
Courtesy of the National Human Genome Research Institute One way researchers discover which genes go with what disease is through a technique called linkage analysis. Here are the stories of four genetic diseases. Faulty DNA breakthrough could lead to 'superior' children. A pioneering technique to ‘fix’ an embryo’s faulty DNA was unveiled by scientists last night.
In a world first, they used gene-editing to cut out DNA from a fertilised egg. The embryo then repaired itself, replacing the mutated material with healthy cells. The technique worked on three quarters of the 58 embryos it was tried on. Human Cloning. Is it time to worry about human cloning again? When Barbara Streisand revealed to Variety magazine that she’d had her dog cloned for $50,000, many people learned for the first time that copying pets and other animals is a real business.
That’s right: you can pay to clone a dog, a horse or a top beef bull and get a living copy back in a matter of months. The story that sent shivers up my spine, though, came out a few days later. GCSE Bitesize: Artificial cloning in animals. Sickle cell anemia patient 'cured' by gene therapy, doctors say. "Since therapy was applied, he hasn't had any pain, any complications.
He is free of any transfusions. He plays sports and goes to school," said Dr. Philippe Leboulch, an author of the new research and a professor of medicine at the University of Paris. EDU'bases langues vivantes - Gene Ethics. Gene ethics presentation sequence 2 0. Paws and play: gene treatment helps rats with spinal cord injury regain their nerve. Rats with spinal cord injuries have regained the use of their paws after being given a groundbreaking gene therapy that helps to mend damaged nerves in the spine.
The new therapy works by dissolving the dense scar tissue that forms a thick barrier between severed nerves when the spinal column is broken. Animals that were given the treatment produced an enzyme called chondroitinase which breaks down scar tissue and allows the broken nerves to reconnect with each other. Tests showed that when the therapy was given for two months, rats relearned the kinds of skilled movements they needed to grab little sugar balls from a platform. Scientists genetically engineer pigs immune to costly disease. Scientists have genetically engineered pigs to be immune to one of the world’s most costly animal diseases, in an advance that could propel gene-editing technology into commercial farms within five years.
The trial, led by the University of Edinburgh’s Roslin Institute, showed that the pigs were completely immune to porcine reproductive and respiratory syndrome (PRRS), a disease that is endemic across the globe and costs the European pig industry nearly £1.5bn in pig deaths and decreased productivity each year. Pigs infected with PRRS are safe to eat but the virus causes the animals breathing problems, causes deaths in piglets and can cause pregnant sows to lose their litter. Scientists debate ethics of human gene editing at international summit. Alternating the promise of cures for intractable diseases with anxiety about designer babies and eugenics, hundreds of scientists and ethicists from around the world began debating the boundaries of a revolutionary technology to edit the human genetic code.
Maria : how far can we go in genetic selection ? (2/2) Maria : how far can we go in genetic selection ? (1/2) Ideas about Genetics. Www.google. Cycle terminal – L’idée de progrès - Langues vivantes - Éduscol. Exemples de démarches détaillées avec simulations d'épreuves orales - Cycle Terminal Les exemples de démarches détaillées sont des ressources d'accompagnement des programmes d'enseignement publiées par le Ministère de l'Éducation nationale et l'Inspection générale de langues vivantes.Zone nationale : ÉduscolDoctor School : projet DNL SVT en section européenne projet interdisciplinaire conçu pour une classe européenne en DNL SVT pour une classe de première scientifique pour rendre les élèves capables de participer à des entretiens médicaux et d'aboutir à une décision de traitement.Zone académique : GrenobleAre Indian reservations the best way to preserve Indians'identity ?
The Art of Genetic Manipulation. By Arius Elvikis. Genetically modified babies given go ahead by UK ethics body. Fear of dystopian change should not blind us to the potential of gene editing. ‘Designer babies on horizon”, ran the headlines. Last week, the Nuffield Council on Bioethics, an independent body advising on policy, published a report on genome editing and human reproduction. The curse of Frankenstein: how archetypal myths shape the way people think about science. “One doesn’t expect Dr Frankenstein to show up in a wool sweater,” wrote political commentator Charles Krauthammer, ominously, in the March 1997 issue of Time magazine.
He was referring to British scientist Dr Ian Wilmut, who eight months earlier had successfully created Dolly, the world’s most famous sheep, by cloning her from another adult sheep’s cell. Krauthammer’s criticism was unsparing. “This was not supposed to happen,” he insisted. Culture - What the myth of Faust can teach us.
Goethe’s Faust The Faust Legend in History and Modern Culture.
TRAAM-TLSE-ANG011-LYC / Cloning - [Site des langues vivantes de l'Académie de Toulouse] 'Designer babies' debate should start, scientists say. Image copyright SPL Rapid progress in genetics is making "designer babies" more likely and society needs to be prepared, leading scientists have told the BBC. Exclusive: Meet the World’s First Baby Born With an Assist from Stem Cells. Doctors in Canada have begun a new chapter in medical history, delivering the first in a wave of babies expected to be born this summer through a technique that some experts think can dramatically improve the success rate of in vitro fertilization (IVF). Now 22 days old, Zain Rajani was born through a new method that relies on the discovery that women have, in their own ovaries, a possible solution to infertility caused by poor egg quality. Pristine stem cells of healthy, yet-to-be developed eggs that can help make a woman’s older eggs act young again.
Unlike other kinds of stem cells, which have the ability to develop into any kind of cell in the body, including cancerous ones, these precursor cells can only form eggs.