Category Archives: DNA

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DNA and RNA paper model lab directions part 3 Cutting and out and assembling a RNA model. Here we use the DNA as the template to make the RNA. By: CuriousMoranland … Continue reading →

3. Starting and Preparing Your DNA Assembly By: synbiota … Continue reading →

Ultrasound is often used for prenatal screening. It's just one of several prenatal screenings available to pregnant women. iStockphoto hide caption Ultrasound is often used for prenatal screening. It's just one of several prenatal screenings available to pregnant women. When Amy Seitz got pregnant with her second child last year, she knew that being 35 years old meant there was an increased chance of chromosomal disorders like Down syndrome. She wanted to be screened, and she knew just what kind of screening she wanted a test that's so new, some women and doctors don't quite realize what they've signed up for. This kind of test , called cell free fetal DNA testing, uses a simple blood sample from an expectant mother to analyze bits of fetal DNA that have leaked into her bloodstream. It's only been on the market since October 2011 and is not regulated by the Food and Drug Administration the FDA does not regulate this type of genetic testing service. Several companies now offer the test, including Sequenom and Illumina. Insurance coverage varies, and doctors often only offer this testing to women at higher risk because of things like advanced maternal age. "I think that I initially … Continue reading →

Cinnamon Bloss had part of her genetic makeup examined by 23andMe. She says the service can provide valuable information about potentially troublesome genes, and insight about how people could respond to certain medications. SACRAMENTO In 1997s futuristic Gattaca, ones DNA determined ones destiny. Released a dozen years after the beginning of real-life genetic testing, the movie tracked a man conceived by love rather than in a lab, as Variety put it. Because his lousy genes limited his career, he went to a DNA broker who sells false identities to the genetically inferior. As with all dystopian stories, Gattaca uses the future to explore trends in the present. Since the movies release, the genetic-data conundrum has become more pronounced. Testing offers great opportunities to cure disease and exonerate the innocent accused of crimes, but it also offers potential for government and private firms to invade privacy and misuse data. A new bill, proposed by Assemblyman Mike Gatto, D-Glendale, attempts to create a balance by making it clear who owns the DNA samples already collected in California hospitals. A government repository of the DNA of all children born? It sounds like something out of 20th century dystopian fiction, Gattos office wrote, in … Continue reading →

Less than a third of siblings with autism shared the same DNA mutations in genes associated with the disorder, according to a new study that is the largest whole-genome sequencing for autism to date. Canadian researchers sequenced whole genomes from 170 siblings with autism spectrum disorder and both their parents. They found that these sibling pairs shared the same autism-relevant gene variations only about 31% of the time, according to the study published online Monday in the journal Nature Medicine. More than a third of the mutations believed to be relevant to autism arose in a seemingly random way, the study also found. It isnt really autism; its autisms, said the studys lead investigator, Dr. Stephen W. Scherer, head of the Center for Applied Genomics, Genetics and Genome Biology at the Hospital for Sick Children in Toronto. In some cases, he added, its like lightning striking twice in the same family. The results are part of 1,000 whole genomes that are being made available to researchers via a massive Google database that autism advocates hope will grow to 10 times that size by next year. The effort, spearheaded by the research and advocacy group Autism Speaks, has been somewhat controversial … Continue reading →

A boxer dog peeps out from its kennel. The breed was developed in Germany in the 19th century and imported to America after the first world war. Photograph: Matt Cardy/Getty Humans began migrating to the Americas roughly 15,000 to 20,000 years ago. But domesticated canines likely didnt show up on American continents until 10,000 years ago, long after humans first arrived, according to a new analysis of ancient dog DNA by University of Illinois researchers. Their findings were published in the Journal of Human Evolution. We were interested in seeing if we could see when dogs arrived in the Americas, said study author Kelsey Witt. Its assumed they came with humans, but no one has actually looked at it. Dogs very likely were domesticated in Asia and then brought over to the Americas, Witt said. What we know about ancient dogs so far is that by the time Europeans arrived, they were pretty widely spread across the Americas. They were used to haul supplies, used as guards, had religious significance for some, used as a food source. For this study, researchers analysed the remains of 84 dogs, including 34 from a single burial site in Illinois that dates back about … Continue reading →

IMAGE:Georgia Tech Associate Professor Francesca Storici (left), Graduate Student Kyung Duk Koh and collaborators have developed and tested a technique for identifying ribonucleotides in genomic DNA. view more Credit: Credit: Rob Felt Ribonucleotides, units of RNA, can become embedded in genomic DNA during processes such as DNA replication and repair, affecting the stability of the genome by contributing to DNA fragility and mutability. Scientists have known about the presence of ribonucleotides in DNA, but until now had not been able to determine exactly what they are and where they are located in the DNA sequences. Now, researchers have developed and tested a new technique known as ribose-seq that allows them to determine the full profile of ribonucleotides embedded in genomic DNA. Using ribose-seq, they have found widespread but not random incorporation and "hotspots" where the RNA insertions accumulate in the nuclear and mitochondrial DNA of a commonly-studied species of budding yeast. Ribose-seq could be used to locate ribonucleotides in the DNA of a wide range of other organisms, including that of humans. "Ribonucleotides are the most abundant non-standard nucleotides that can be found in DNA, but until now there has not been a system to determine where they are located … Continue reading →

I'm a one-man melting pot. Published Jan. 26, 2015 at 9:01 a.m. The numbers are tiny, but in a way, they're exactly what I was hoping for when I had my DNA tested by AncestryDNA. You know, that moment when Henry Louis Gates Jr. shocks the famous guest on "Finding Your Roots" with unexpected data. When my results arrived, there was no major surprise. This Italian-, German-, English-American boy is the proud owner of 98 percent "European" chromosomal goodness. But nestled within that statistic is three percent European Jewish (doesn't say whether Sephardic or Ashkenazy). The remaining two percent? Middle Eastern! Most people want to know why I tested myself and I don't really have an answer beyond plain ol' curiosity. I climbed the mountain because it was there and to see what was on the other side. And, says Christine Kenneally, author of "The Invisible History of the Human Race: How DNA and History Shape Our Identities and Our Futures," that hazy expectation is pretty common among folks who take the test, which is offered by a handful of companies. "Usually it's a mix of questions about ancestry and health," she says. "Many people I spoke to were actually … Continue reading →

CoD AW - EPIC DNA FAIL Dumm. By: TheGamingCompany … Continue reading →