Latest Population genetics Stories

2009-04-30 14:30:00

An international team of researchers has reported the largest-ever study of genetics in Africa that helps pinpoint where human evolution began. The 10-year study combined efforts from African, American, and European researchers who studied 121 African populations, four African American populations and 60 non-African populations to uncover more than four million genotypes. Teams were looking for patterns of variation at 1327 DNA markers. They discovered that about 71 percent of the African...

2009-04-29 14:15:15

For two decades, researchers have been using a growing volume of genetic data to debate whether ancestors of Native Americans emigrated to the New World in one wave or successive waves, or from one ancestral Asian population or a number of different populations. Now, after painstakingly comparing DNA samples from people in dozens of modern-day Native American and Eurasian groups, an international team of scientists thinks it can put the matter to rest: Virtually without exception the new...

2009-04-16 11:00:00

Scientists have discovered a link between two genetic variants and an increased risk of ischemic stroke. The study, which was supported by the National Heart, Lung, and Blood Institute (NHLBI) of the National Institutes of Health, analyzed the genomes of more than 19,000 individuals from the Cohorts for Heart and Aging Research in Genomic Epidemiology (CHARGE) consortium. With more than 150,000 Americans suffering from stroke each year, ischemic strokes are the third leading cause of death in...

2009-04-15 18:01:55

A genetic study suggests inbreeding led to the demise of Spain's powerful Hapsburg dynasty, Spanish scientists said. The Hapsburgs ruled a global empire from 1516 until the death of Spain's King Charles II in 1700. Gonzalo Alvarez of Spain's University of Santiago de Compostela said generations of intermarriage left the king unable to provide an heir, Britain's Daily Telegraph reported Wednesday. The study, published in the journal Public Library of Science, found that nine out of 11 Hapsburg...

2009-04-15 10:13:22

The powerful Habsburg dynasty ruled Spain and its empire from 1516 to 1700 but when King Charles II died in 1700 without any children from his two marriages, the male line died out and the French Bourbon dynasty came to power in Spain. Reporting in the open-access, peer-reviewed journal PLoS ONE, April 15, Gonzalo Alvarez and colleagues at the University of Santiago de Compostela, Spain, provide genetic evidence to support the historical evidence that the high frequency of inbreeding (mating...

2009-04-07 13:59:26

Scientists say they've found extreme inbreeding of an isolated wolf population at a U.S. island national park has resulted in genetically deformed bones. Michigan Technological University researchers say they've collected the first scientific evidence that inbreeding caused the genetic deterioration of the bones of the wolves at Isle Royale National Park in northern Lake Superior. Rolf Peterson and John Vucetich of Michigan Tech and their colleagues -- Jannikke Raikkonen of the Swedish Museum...

2009-03-31 09:54:18

Ant and bee colonies have long fascinated biologists because of their hierarchical social structure and the apparently altruistic behavior of female workers in rearing the queen's young rather than reproducing themselves. In colonies headed by a single queen, this makes evolutionary sense in that the workers are as closely related to the princesses and princes they nurture as they would be to their own children. Thus the genes underlying this behavior would be successfully transmitted through...

2009-03-30 09:31:34

U.S. researchers say they've determined even a tiny genetic variation can control how quickly and well lungs grow and function in children and adolescents. And the University of Southern California scientists say it also can determine how susceptible children will be to exposure to second-hand tobacco smoke, even in utero. We wanted to determine whether specific gene variations would have measurable and predictable effects on lung function growth and susceptibility to environmental insults,...

2009-03-10 08:53:45

More and more information is being gathered about how human genes influence medically relevant traits, such as the propensity to develop a certain disease. The ultimate goal is to predict whether or not a given trait will develop later in life from the genome sequence alone (i.e. from the sequence of the bases that make up the DNA strands that store genetic information in every cell of the body). Now, writing in the journal Current Biology, a Cell Press publication, a group of researchers...

2009-02-25 15:04:06

Statistical model using Bayesian networks shows promise as a clinical tool A new statistical model could be used to predict an individual's lifetime risk of stroke, finds a study from the Children's Hospital Informatics Program (CHIP). Using genetic information from 569 hospital patients, the researchers showed that their predictive model could estimate an individual's overall risk of cardioembolic stroke -- the most common form of stroke -- with 86 percent accuracy. The findings are...

Latest Population genetics Reference Libraries

House Mouse, Mus musculus
2012-05-01 11:42:07

Even in the wild, this rodent is associated with humans by destroying crops and stored food. The house mouse is also known as the fancy mouse, a common pet. It is also a widely used laboratory animal, important for testing in genetics, biology, and medicine. There are three recognized subspecies of the house mouse. These mice thrive in a number of locations including fields, houses, and commercial structures. An adult male house mouse can have a body length of up to 3.9 in, and tail length...

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Word of the Day
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.