August 10, 2011 |
Intelligence is in the genes, researchers reported Tuesday in the journal Molecular Psychology. The international team, led by Ian Deary of the University of Edinburgh in Scotland and Peter Visscher of the Queensland Institute of Medical Research in Brisbane, Australia, compared the DNA of more than 3,500 people, middle aged and older, who also had taken intelligence tests. They calculated that more than 40% of the differences in intelligence among...
January 27, 2014 |
Blue-eyed people have been living in Europe for at least 7,000 years, scientists have discovered. A man who lived on the Iberian peninsula before Europeans became farmers probably had blue eyes but dark hair and skin, according to scientists who have sequenced his DNA. This surprising combination of eye, hair and skin coloring may have not have been unusual during his lifetime, but it is no longer seen among modern Europeans, the team reported ...
January 29, 2014 |
Mating between Neanderthals and the ancestors of Europeans and East Asians gave our forebears important evolutionary advantages but may have created a lot of sterile males, wiping out much of that primitive DNA, new genetic studies suggest. The comparison of Neanderthal and modern human genomes, published online Wednesday in the journals Nature and Science , identified specific sequences of altered DNA that both Neanderthals and several...
October 4, 2011 |
Why do some children of mean, neglectful or downright toxic parents become rotten human beings themselves, while their siblings thrive cheerfully? And why do certain offspring of loving, attentive parents grow into well-adjusted adulthood while their siblings become sour misanthropes? In short, why does good parenting only sometimes produce good kids, and bad parenting only sometimes produce bad kids? The answer may lie in the genes. Specifically, the almost-famous 5-HTTLPR serotonin transporter-promoter gene, which governs the activity of the mood chemical serotonin in the brain and essentially comes in three varieties.
April 16, 2013 |
Fainting may be in our genes, which may explain why keeling over at the sight of blood tends to run in families, according to researchers in Australia. The researchers located a specific region on chromosome 15 that is thought to be a prime suspect for "vasovagal syncope," a drop in blood pressure followed by loss of consciousness. The study "strengthens the evidence that fainting may be commonly genetic," said neurologist Samuel Berkovic of the University of Melbourne in Victoria, Australia, author of the report published this week in the journal Neurology.
November 17, 2011 |
Smokers who have repeatedly tried to quit and failed over the years probably have genes that make it extra hard to overcome the addiction, the authors of a new study say. Thursday marks the 36th annual Great American Smokeout. To be sure, the dire health consequences of smoking are well-known, and many adults have quit over the past four decades. But some individuals have great difficulty quitting. The new study, by researchers at the University of Colorado, examined adult twins to look for a genetic influence in tobacco addiction.