Tag: genetics (page 2 of 2)

New Technology Can Test How Toxic a Substance is to Your DNA 

October 8, 2014 / / 0 Comments

A technique for high throughput screening of substances that could cause DNA damage has been developed by scientists. The technology allows for testing of drugs and cosmetics that could pose a risk to human health, and assesses damage done to DNA, while reducing reliance on animal testing, researchers say.As more hand held and portable devices on the market are being developed for nanoparticle-based DNA sensing, many are able to detect and analyze organisms one-thousandth of the widt [...]

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Is the Human Race Evolving to Have Three Strands of DNA?

October 6, 2014 / / 0 Comments

by PL Chang and JacquelineMany scientists are challenging the idea that we humans have more than two or even three strands of DNA. Some even believe that we may have a total of 12 strands or more. DNA is the acronym used for deoxyribonucleic acid. It contains the codes that act like a blueprint, giving instructions to cells and telling them how to behave. MostDNA is found in the cell nucleus (nuclear DNA), while a small amount is found in the mitochondria (mDNA).The conventional DNA m [...]

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Hemp Repairs Damaged DNA

September 27, 2014 / / 0 Comments

by hightimes.comScientists have discovered astounding new evidence that suggests hemp proteins have the capacity to repair damaged DNA -- a phenomenon that occurs in all humans as the result of aging. While the majority of people are aware that DNA, or deoxyribonucleic acid, is present within most living organisms, there is perhaps a larger percentage who are completely oblivious to the fact that this hereditary material accumulates damage in a manner similar to wear and tea [...]

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Scientists Admit There Is a Second, Secret DNA Code Which Controls Genes

September 16, 2014 / / 0 Comments

Contributed by Michael ForresterThe fascinating and recent discovery of a new, second DNA code further lends credence to what metaphysical scientists have been saying for millennia -- the body speaks two different languages.Since the genetic code was deciphered in the 1960s, researchers have assumed that it was used exclusively to write information about proteins.But biologists have suspected for years that some kind of epigenetic inheritance occurs at the cellular level. The different [...]

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Cosmic Radiation And Light Changes DNA

September 11, 2014 / / 0 Comments

*This article is based on academic research referenced in David Wilcock’s The Source Field Investigations and his follow up book The Synchronicity Key: The Hidden Intelligence Guiding the Universe & You. I highly recommend you check out both of these books for further information. DNA is essential to any scientific understanding of life. One strand of the double-helix holds the complete code that is needed to clone an entire organism. The process of DNA f [...]

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The Evidence for Mitochondrial Eve ~ Are we all descended from a common female ancestor?

September 5, 2014 / / 0 Comments


DNA Pictures



In 1987, a group of genet­icists published a surprising study in the journal Nature.­ The­ researchers examined the mitochondrial DNA (mtDNA) taken from 147 people across all of today's major racial groups. These researchers found that the lineage of all people alive today falls on one of two branches in humanity's family tree. One of these branches consists of nothing but African lineage, the other contains all other groups, including some African lineage.
­Even more impressive, the geneticists concluded that every person on Earth right now can trace his or her lineage back to a single common female ancestor who lived around 200,000 years ago. Because one entire branch of human lineage is of African origin and the other contains African lineage as well, the study's authors concluded Africa is the place where this woman lived. The scientists named this common female ancestor Mitochondrial Eve.
­The researchers got the idea for this project based on a discovery another geneticist made in 1980. Dr. Wesley Brown noticed that when you compare the mtDNA of two humans, th­e samples are much more similar than when the mtDNA of two other primates -- for example, two chimpanzees -- is compared. Brown found, in fact, that the mtDNA of two humans has only about half as many differences as the mtDNA of two other primates within the same species [source: Cann]. This suggests that humans share a much more recent common ancestor than other primates do, an idea tantalizing enough to launch the Nature investigation.
The study's lead author, Rebecca Cann, called her colleagues' and her choice to use Eve as the name "a playful misnomer," and pointed out that the study wasn't implying that the Mitochondrial Eve wasn't the first -- or only -- woman on Earth during the time she lived [source: Cann]. Instead, this woman is simply the most recent person to whom all people can trace their genealogy. In other words, there were many women who came before her and many women who came after, but her life is the point from which all modern branches on humanity's family tree grew.
When the researchers in the 1987 study looked at samples taken from 147 different people and fetuses, they found 133 distinct sequences of mtDNA. A few of the people sampled, it turned out, were recently related. After comparing the number of differences among the mtDNA samples within races, they found that Africans have the most diversity (that is, the most number of differences) of any single racial group. This would suggest that the mtDNA found in Africans is the oldest: Since it has had the most mutations, a process which takes time, it must be the oldest of lineages around today.
The two distinct branches they discovered contained the mtDNA found in the five main populations on the planet: African, Asian, European, Australian and New Guinean. Researchers found that in the branch that was not exclusively African, racial populations often had more than one lineage. For example, one New Guinean lineage finds its closest relative in a lineage present in Asia, not New Guinea. All of the lineages and both of the two branches, however, can all be traced back to one theorized point: Mitochondrial Eve.
So how did Eve end up being humanity's most recent common ancestor? We'll look at that in this article, as well as some arguments lodged against the Mitochondrial Eve theory. But first, what are mitochondria and why do scientists use mtDNA to track lineage?

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Genetics and the Incarnation of Man ~ with Doug Hamp

September 5, 2014 / / 0 Comments

Click to zoomMan

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Genetic Genealogy ~ What haplogroup do you belong to?

August 23, 2014 / / 0 Comments



Dr. Spencer Wells talking about human ancestry. Photo courtesy of genographic.com

Posted by Miguel Vilar

While millions of people spent last weekend dumping buckets of ice water on their heads and documenting it on Facebook to raise money and awareness for ALS, a few us genetics geeks gathered and talked about haplogroups*  A, L and S, among others.

*Never heard of a haplogroup? Don’t worry, it’s not because you have a brain freeze. A haplogroup is a branch on the human family tree. All people belong to a haplogroup based on genetic markers carried in their cells. People belonging to the same haplogroup trace their descent to a common ancestor and a specific place where that ancestor once may have lived.
Last Saturday morning at the first International Conference for Genetic Genealogy in Chevy Chase, Maryland, Genographic Project Director and National Geographic Explorer-in-Residence Dr. Spencer Wells delivered the Keynote to an audience of 300 genetic genealogists.   He spoke about the popularity of the field and how fast consumer genetics has grown since the launch of The Genographic Project in 2005. “In 2013 the one-millionth person tested their DNA,” explained Wells, “just twelve years since the first human genome was sequenced. But this summer the two-millionth person has already tested their DNA.” The growth has been exponential, thanks in great part to the interest and promotion by those who gathered at the conference.
Dr. Wells explains the trends in genetics
Dr. Wells explains the trends in genetics. Chart courtesy of Spencer Wells
In addition to Dr. Wells, the Genographic Project was represented by Russian scientist, Dr. Oleg Balanovsky. Dr. Balanovksy talked about his efforts in mapping the world’s genetic diversity, and how his scientific partnership with the Genographic Project has informed questions like “If we are all related, where did our shared grandpas come from?”

Several leaders in the field of genetic genealogy also spoke, including Jim Bartlett, Katherine Borges, Rebekah Canada, Tim Janzen and Cece Moore. Doing his part to promote population genetics was blogger and PhD candidate Razib Kahn, who spoke about piecing together the puzzle that is ancient ancestry. Ancestry DNA was well represented by biologist Dr. Julie Granka who explained how they use DNA to help match their participants with relatives. And Dr. Joanna Mountain shared with the audience her efforts with 23andMe.
Razib Kahn talks about how we study ancestry through DNA
Razib Kahn talks about how we study ancestry through DNA. Photo by Miguel Vilar
Of the many topics discussed, it was clear that citizen science was the hot topic in this field. The public is generally more comfortable talking about their personal genomic details and a general interest in science has increased. As a result, people are encouraging friends and family to test and study their DNA. Who knows? As more people participate and find new connections and matches, genetic genealogy could become the new Facebook of science!

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DNA Analysis Shows That Native American Genealogy Is One of the Most Unique in the World

August 14, 2014 / / 0 Comments

The suppression of the Native Americans and the decimation of their culture is a black page in the history of the United States. The discrimination and injustices towards this ancient race, which had lived on the American continent long before the European conquerors came to this land, are still present to this day despite the efforts of different groups and organizations trying to restore justice.The destruction of their culture is one of the most shameful aspects of our hi [...]

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Scientific proof human race was created by aliens

August 13, 2014 / / 0 Comments

ufosightingshotspot.blogspot.com A group of researchers worked for 13 years at the Human Genome Project (Project completed in 2003) indicate that they made an astonishing scientific discovery: They believe so-called 97% non-coding sequences in human...

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this one is to inspire Dre

June 1, 2010 / / 0 Comments

i found this on sign of the times news.

Scientists 'Create Simple Life Form'
Print
Einstein

Danny Buckland
Mirror.co.uk
Fri, 21 May 2010 21:35 EDT

A billionaire biologist claims to have created artificial life.

And he says his designer microbe could have a revolutionary impact on healthcare, ushering in new treatments and drugs.

The £30million research programme, lasting 15 years, manufactured artificial DNA, inserted it in a bacterial cell and watched it reproduce itself.

Dr Craig Venter, who heads his selfnamed research institute in Maryland, believes the work will have applications from synthesising fuel to protecting the environment. Some scientists have hailed the research, published in the journal Science, as a defining moment in biology.

But one independent genetics watchdog has condemned the research and called for a stop to synthetic biology.

David King of Human Genetics Alert said. "This is simply large-scale chemistry and genetic engineering. The hype is typical of how biotechnology companies try to boost their share prices. It is typical 'greenwash' marketing"

But Dr Mark Downs of charity the Society of Biology said: "This is a landmark in biological research which has the potential to bring new business opportunities

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