Category Archives: DNA

DNA - One Reason (ft.Bizzurke and Joe Gallant)
(prod. Ruler Why Robie Rowland) Facebook: https://www.facebook.com/DNAtheG Soundcloud: https://soundcloud.com/laureate.

By: BeEasy617

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DNA - One Reason (ft.Bizzurke and Joe Gallant) - Video

DNA Predicts O-Red vs Big T to be a SM3 Classic
http://www.vladtv.com/ - Battle Rap journalist Michael Hughes and cameraman Ellis Flynn caught up with DNA at Summer Madness 3 prior to the event starting and the fight that occurred between...

By: djvlad

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DNA Predicts O-Red vs Big T to be a SM3 Classic - Video

Scientists have produced a digital image of a genome tens of thousands of years old with the resolution of a typical living person's, enabling them to describe the life of prehistoric humans in great detail, they reported in Thursday's issue of Science magazine.

Led by Svante Paabo of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, the scientists have created the highest-quality genome sequence of prehistoric humans yet.

Therefore, the Denisovans as the group has been called after the Siberian cave harboring its fossils: a finger bone and two teeth are much better known genetically than Neanderthals, although there are hundreds of specimens from them.

There is no difference in what we can learn genetically about a person that lived 50,000 years ago and from a person today, Paabo said Wednesday in a conference call with reporters.

The international team of researchers used only genetic material from a tiny finger bone from a girl that lived in Siberia tens of thousands of years ago. The specimen was found in a cave in 2008 and, based on preliminary genetical analyses by the team in 2010, was attributed to a novel group of humans closely related to Neanderthals.

The scientists owe their insights mainly to new technological advances in sequencing of prehistoric DNA.

All forensics on ancient DNA were originally developed for modern DNA, said Matthias Meyer of the Max Planck Institute, lead author of the article.

He was responsible for developing approaches that take into account challenges typical for prehistoric genetic material, such as its scarcity and degraded state.

Using the DNA, the scientists reconstructed the appearance of the Siberian girl: She had brown eyes and dark hair and skin.

Also from genetic information, the scientists pieced together the girl's pedigree and compared it with that of modern humans and Neanderthals.

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DNA Offers Sharp Image of Prehistoric Humans

After decades of digging, paleoanthropologists say modern humans arose in Africa some 200,000 years ago and all archaic species of humans then disappeared, surviving only outside Africa, as did the Neanderthals in Europe.

Geneticists studying DNA now say that, to the contrary, a previously unknown archaic species of human, a cousin of the Neanderthals, may have lingered in Africa until perhaps 25,000 years ago, coexisting with the modern humans and on occasion interbreeding with them.

The geneticists reached this conclusion, reported on Thursday in the journal Cell, after decoding the entire genome of three isolated hunter-gatherer peoples in Africa, hoping to cast light on the origins of modern human evolution.

But some paleonanthropologists are skeptical because the fossil record has nothing that would support the geneticists' statistical calculations.

The geneticists, led by Joseph Lachance and Sarah Tishkoff of the University of Pennsylvania, decoded the entire genomes of five men each from two Tanzanian tribes and the forest-dwelling pygmies of Cameroon. The genomes of the pygmies and the Tanzanians contained many short stretches of DNA with highly unusual sequences. Through mutation, the genomes of species that once had a common ancestor grow increasingly unlike one another.

Tishkoff's team interprets these divergent DNA sequences as genetic remnants of an interbreeding with an archaic species of human. Genetic calculations suggest the interbreeding took place between 20,000 and 80,000 years ago.

Richard Klein, a paleoanthropologist at Stanford University, said the new claim of archaic and modern human interbreeding is a further example of the tendency for geneticists to ignore fossil and archaeological evidence, perhaps because they think it can always be molded to fit the genetics after the fact.

Tishkoff said she agreed on the need for caution in making statistical inferences, and that there are other events besides interbreeding that can make a single DNA sequence look ancient. But when you see it at a genomewide level, it's harder to explain away, she said.

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DNA and fossils tell differing tales of human origins

Metal Fight Beyblade Zero G Episode 29 Encirclement ZEROG DNA Preview

By: unguzaofue

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Metal Fight Beyblade Zero G Episode 29 Encirclement ZEROG DNA Preview - Video

DJ DNA - Midi
BESTSOULBEATS - Experience Music In a New Way. » Facebook: https://www.facebook.com/BESTSOULBEATS » Soundcloud: https://soundcloud.com/bestsoulbeats ? Follow...

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DJ DNA - Midi - Video

RAW: Elaina #39;s father, T.J. Steinfurth mourns confirming DNA results of Elaina #39;s remains
Elaina #39;s father, T.J. Steinfurth said the hardest part was informing his other daughter that Elaina would not be coming home. For the latest News-Weather-Spo...

By: WNWOtv

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RAW: Elaina's father, T.J. Steinfurth mourns confirming DNA results of Elaina's remains - Video

Press Conference Regarding Additional DNA Matches to Serial Rapes
Major Jeff Cotner updates the media regarding the three additional sexual assault offenses linked to Van Dralan Dixson. He has now been linked to four sexual...

By: DallasPoliceDept

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Press Conference Regarding Additional DNA Matches to Serial Rapes - Video

A DNA expert known nationally for her criticism that led to the temporary shuttering of Houston's crime lab turned a skeptical eye to Bexar County's procedures Tuesday as testimony resumed in the high-profile murder trial of Jon Thomas Ford.

Dr. Elizabeth Johnson described the DNA analysis of a bloody towel found over the head of Dana Clair Edwards, 32, as potentially sloppy.

Ford, 43, was arrested in February 2010 a little more than a year after Edwards, his ex-girlfriend, was found strangled on the floor of her guest bathroom. Her dog Grit was found dead at nearby Olmos Dam a week later.

Ford told police he was home asleep in the first hours of New Year's Day 2009, when the killing is believed to have occurred, but his cellphone records suggest otherwise. The eventual link of Ford's DNA to the towel was one of the major breaks in the case that led to the arrest, authorities have said.

Johnson on Tuesday focused in part on the admission that a Bexar County crime lab analyst found his own DNA in one of eight cuttings he took from the towel. Two other cuttings showed DNA consistent with Ford's.

That's really bad form. ... It's among the most preventable types of contamination, Johnson said. Any time you see an analyst that had a careless event such as this ... you have to wonder how careless and sloppy that person is.

Johnson took the stand at the request of defense attorney Dick DeGuerin, who once represented her in a successful whistle-blower lawsuit against Harris County, where she helped establish a DNA lab in the early 1990s.

Her later criticism of the Houston Police Department's embattled crime lab has been credited, in part, with leading to the facility being shut down in 2002. The lab's DNA division remained shuttered for four years.

But prosecutor Kirsta Melton noted during cross-examination that Johnson, whose consulting business is based out of Southern California, seems to work exclusively for defense attorneys these days.

Ford's DNA was discovered on the towel in December 2009, but his DNA swab obtained by police wasn't tested for comparison until a month later, Melton pointed out. That would make accidental cross-contamination in the lab an impossibility, she suggested.

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Witness targets analysis of DNA

A Thai medic checks bodies for forensic identity in Phang Nga province in southern of Thailand on Jan. 11, 2005. Thousands of people were killed in Thailand after a massive tsunami struck on Dec. 26, 2004.

Human DNA is the ultimate fingerprint. A single hair can contain enough information to determine someone's identity a feature that's been invaluable for identifying the unnamed casualties of natural disasters and war. But forensic scientists who use DNA say the technology isn't always available where it's most needed, like in poor countries, or in war zones like Syria.

The technology is often too expensive or too complicated, and where there are large numbers of unknown dead, you need far more than just DNA profiling equipment. You also need sophisticated computer programs to organize and match DNA samples from numerous family members, as well as experts to read the samples properly.

Alex John London, a medical ethicist at Carnegie Mellon University, says that while there are numerous groups that do DNA identification worldwide, and the process is often ad hoc and erratic.

It was largely the Indian Ocean tsunami that got forensic experts thinking. There were tens of thousands of unidentified bodies, and DNA experts flocked to Thailand to set up labs. Tom Parsons, a DNA expert with the International Commission on Missing Persons, says Thailand got the attention because western tourists died there. Their governments sent teams to find their bodies, but it didn't go well.

"All of the world's first-rate forensic teams took off to Thailand, where white people were killed," Parsons says, "with no centralized plan, pushing and pulling." Governments funded the effort because they wanted their citizens' remains back. But it was "really a mess," says Parsons. Different groups wouldn't share their technology, and even disagreed on how to do the DNA analysis. There was little coordination.

Eventually Interpol, the international police organization, intervened. The commission ended up identifying some 900 people, mostly Thais who might not have been identified otherwise.

Parsons says in the end the DNA work in Thailand was a success, but it revealed to forensic experts that there might be a better way to do this that in fact a permanent organization with DNA "chops," money and an international mandate to respond to disasters might work better.

"Our concern was that there should be a mechanism in place that would allow access to DNA identification beyond just ability to pay," London says. "Too often if there isn't a funder out there, then people who are missing relatives won't get access to the technology."

So forensic scientists are calling for the creation of a DNA identification organization one that functions much in the same way the International Atomic Energy Agency does, which sends inspectors to nuclear facilities.

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After Disasters, DNA Science Is Helpful, But Often Too Pricey