Suppose your cousin leaves DNA evidence at a crime scene… and then police arrive at your door, because your DNA is similar to your cousin’s, and police found your DNA in a genealogical database. Does that seem like a good thing to you, or something from dystopian fiction?
It was a high-profile crime in New York City—a jogger was murdered while running in a local park, and detectives had few leads. As the months passed and the crime remained unsolved, the victim’s family began pushing for wider use of familial DNA, or searching DNA databases for partial matches to DNA evidence that might represent a family member of the killer (the technique has been successfully used). Detectives eventually identified a suspect without it, but the idea of familial DNA testing is not going away. [continue]
If you have your DNA tested for genetic concerns, should the results be private? Or should you be forced to share that information with insurance companies and your employer? That issue is in the news this week. The USA moved in one direction (Guess what they decided – I know you can!) and Canada did the opposite.
Over the objection of their own government, dozens of Liberal backbenchers voted Wednesday night in favour of a bill banning genetic discrimination.
In voting for what is known as Bill S-201, the backbench Liberals, along with all Conservative, NDP and Green Party MPs made it a crime for, among other things, insurance companies to demand potential customers provide a DNA test in order to get a policy. Additionally, no company will be able to deny someone a job if they fail to have their genes tested.
Protection from discrimination because of an individual’s genetic makeup will now be written into the Canadian Labour Code and the Canadian Human Rights Act. [continue]
For societies with writing systems, hereditary leadership is documented as one of the hallmarks of early political complexity and governance. In contrast, it is unknown whether hereditary succession played a role in the early formation of prehistoric complex societies that lacked writing. Here we use an archaeogenomic approach to identify an elite matriline that persisted between 800 and 1130 CE in Chaco Canyon, the centre of an expansive prehistoric complex society in the Southwestern United States. We show that nine individuals buried in an elite crypt at Pueblo Bonito, the largest structure in the canyon, have identical mitochondrial genomes. Analyses of nuclear genome data from six samples with the highest DNA preservation demonstrate mother–daughter and grandmother–grandson relationships, evidence for a multigenerational matrilineal descent group. Together, these results demonstrate the persistence of an elite matriline in Chaco for ∼330 years. [continue]
The Vikings plundered, raided, and eventually reigned over a large part of what is modern day England. But exactly how many Danish Vikings migrated west and settled down in the British Isles?
In 2015, a large DNA study sparked a row between DNA scientists and archaeologists after concluding that the Danish Vikings had a “relatively limited” influence on the British—a direct contradiction to archaeological remains and historical documents.
“We see no clear genetic evidence of the Danish Viking occupation and control of a large part of England,” write DNA scientists in a study published in the scientific journal Nature in 2015.
A new study has reignited the debate by claiming that somewhere between 20,000 and 35,000 Vikings relocated to England. [continue]
The woolly mammoth vanished from the Earth 4,000 years ago, but now scientists say they are on the brink of resurrecting the ancient beast in a revised form, through an ambitious feat of genetic engineering.
Speaking ahead of the American Association for the Advancement of Science (AAAS) annual meeting in Boston this week, the scientist leading the “de-extinction” effort said the Harvard team is just two years away from creating a hybrid embryo, in which mammoth traits would be programmed into an Asian elephant.
“Our aim is to produce a hybrid elephant-mammoth embryo,” said Prof George Church. “Actually, it would be more like an elephant with a number of mammoth traits. We’re not there yet, but it could happen in a couple of years.” (…)
I am particulartly interested in this part of the article:
Church, a guest speaker at the meeting, said the mammoth project had two goals: securing an alternative future for the endangered Asian elephant and helping to combat global warming. Woolly mammoths could help prevent tundra permafrost from melting and releasing huge amounts of greenhouse gas into the atmosphere.
“They keep the tundra from thawing by punching through snow and allowing cold air to come in,” said Church. “In the summer they knock down trees and help the grass grow.” [continue]
A new tool called the Geographic Population Structure (GPS), which converts DNA data into its ancestral coordinates, has pinpointed origin of Yiddish speakers, according to a team of researchers led by Dr. Eran Elhaik of the University of Sheffield, UK. [continue]
Using the three-year-old technique, researchers have already reversed mutations that cause blindness, stopped cancer cells from multiplying, and made cells impervious to the virus that causes AIDS. Agronomists have rendered wheat invulnerable to killer fungi like powdery mildew, hinting at engineered staple crops that can feed a population of 9 billion on an ever-warmer planet. Bioengineers have used Crispr to alter the DNA of yeast so that it consumes plant matter and excretes ethanol, promising an end to reliance on petrochemicals. Startups devoted to Crispr have launched. International pharmaceutical and agricultural companies have spun up Crispr R&D. Two of the most powerful universities in the US are engaged in a vicious war over the basic patent. Depending on what kind of person you are, Crispr makes you see a gleaming world of the future, a Nobel medallion, or dollar signs.
The technique is revolutionary, and like all revolutions, it’s perilous. Crispr goes well beyond anything the Asilomar conference discussed. It could at last allow genetics researchers to conjure everything anyone has ever worried they would—designer babies, invasive mutants, species-specific bioweapons, and a dozen other apocalyptic sci-fi tropes. It brings with it all-new rules for the practice of research in the life sciences. But no one knows what the rules are—or who will be the first to break them. [continue]
You may not know it, but you probably have some Neanderthal in you. For people around the world, except sub-Saharan Africans, about 1 to 3 per cent of their DNA comes from Neanderthals, our close cousins who disappeared roughly 39,000 years ago.
Scientists said on Monday a jawbone unearthed in Romania, of a man who lived about 40,000 years ago, boasts the most Neanderthal ancestry ever seen in a member of our species.
The finding also indicates that interbreeding with Neanderthals occurred much more recently than previously known. [continue]
The photo published with the article is pretty cool, btw.
Last winter two bodies were found in Norway and the Netherlands. They were wearing identical wetsuits. The police in three countries were involved in the case, but never managed to identify them. This is the story of who they were. [continue]
The research also sheds light on how modern Europeans came to look the way they do – and that these various traits may originate in different ancient populations. Blue eyes, it suggests, could come from hunter gatherers in Mesolithic Europe (10,000 to 5,000 BC), while other characteristics arrived later with newcomers from the East. [continue]
Genetic material from fungi collections at Purdue University and the Royal Botanic Gardens, Kew, helped a team of researchers resolve the mushroom “tree of life,” a map of the relationships between key mushroom species and their evolutionary history that scientists have struggled to piece together for more than 200 years. [continue].
I guess that means all of my mushroom identification books will be outdated in a few years. But that’s ok. Better to know a thing than not to know a thing, for the most part.
The invention of the toilet accomplished many good things, but it did rob us of the chance at immortality – through our poop. Ancient humans have revealed some of their greatest secrets through paleofeces, the study of the waste they left behind. [continue]