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Latest Population genetics Stories

2009-06-08 09:25:07

U.S. biologists have found the loss of pelvises and body armor in two species of stickleback fish was caused by different genes. The finding surprised University of Utah researchers, who expected the same genes would control the same evolutionary changes in both related fish. We knew that in many cases of evolution, the same gene has been used over and over again -- even in different species -- to give the same anatomy, Assistant Professor Mike Shapiro said. What we are finding now is that...

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2009-06-05 08:30:00

New research indicates that natural selection may shape the human genome much more slowly than previously thought. Other factors -- the movements of humans within and among continents, the expansions and contractions of populations, and the vagaries of genetic chance "“ have heavily influenced the distribution of genetic variations in populations around the world. The study, conducted by a team from the Howard Hughes Medical Institute, the University of Chicago, the University of...

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2009-05-25 10:25:00

A Brazilian study has found that people are subconsciously more likely to choose a partner whose genetic make-up is different to their own, further cementing the adage that opposites really do attract, Reuters reported. Married couples were found to be more likely to have genetic differences in a DNA region governing the immune system than were randomly matched pairs, the researchers said. Maria da Graca Bicalho and her colleagues at the University of Parana in Brazil reported that this was...

2009-05-25 09:27:55

Thank parasites for making some of our immune proteins into the inflammatory defenders they are today, according to a population genetics study that will appear in the June 8 issue of the Journal of Experimental Medicine (online May 25). The study, conducted by a team of researchers in Italy, also suggests that you might blame parasites for sculpting some of those genes into risk factors for intestinal disorders. Parasite-driven selection leaves a footprint on our DNA in the form of mutations...

2009-05-17 13:24:00

Reykjavik, ICELAND, May 17 /PRNewswire-FirstCall/ -- In a paper published today in the online edition of Nature Genetics, scientists from deCODE genetics (Nasdaq:DCGN) and academic colleagues from Iceland, Denmark and the Netherlands present the discovery of single letter variations in the sequence of the human genome (SNPs) that influence the age of girls at menarche, the first menstrual period. Age at menarche (AAM) is influenced by both genetic and environmental factors, though the...

2009-04-30 19:20:39

A 10-year study of African population genetics has determined the continent is the most genetically diverse in the world, researchers said Thursday. The team headed by Sara Tishkoff, a geneticist at the University of Pennsylvania, determined that modern humans evolved in southern Africa on the border between Namibia and South Africa. They left the continent by way of East Africa at about the midpoint in the Red Sea. The research team collected data from 14 African populations, four...

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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...

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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...


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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