Genetic variation
hideGenetic variation, variation in alleles of genes, occurs both within and among populations. Genetic variation is important because it provides the “raw material” for natural selection.
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News tagged with genetic variation
First 'genetic map' of Han Chinese may aid search for disease susceptibility genes
Nov 25, 2009 |
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The first genetic historical map of the Han Chinese, the largest ethnic population in the world, as they migrated from south to north over evolutionary time. was published online today by the American Journal of Human Ge ...
Against expectations, genetic variation does not alter asthma treatment response
Nov 24, 2009 |
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(PhysOrg.com) -- Studies have suggested that asthma patients with a specific genetic variation might not respond as well to certain treatments as those with a different variation. But a new study in this week's edition of ...
Study links genetic variation to individual empathy, stress levels
Medicine & Health / Psychology & Psychiatry
Nov 16, 2009 |
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Researchers have discovered a genetic variation that may contribute to how empathetic a human is, and how that person reacts to stress. In the first study of its kind, a variation in the hormone/neurotransmitter oxytocin's ...
Study looks at scientific, cultural perspectives on race
Nov 17, 2009 |
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(PhysOrg.com) -- A new study compares personal perceptions of race, color and ancestry of Brazilian high school students with the results of genetic ancestry tests, with the aim of investigating the tensions between cultural ...
Racial disparity in colon cancer survival not easily explained, researchers say (w/ Video)
Nov 23, 2009 |
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A new study by University of Alabama at Birmingham (UAB) researchers shows that body-mass index (BMI) and co-existing medical conditions (co-morbidity) do not explain the decreased survival observed among African-Americans ...
Genetic link to vitamin A deficiency
Nov 17, 2009 |
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(PhysOrg.com) -- Almost half of UK women may be lacking an important source of vitamin A due to a previously undiscovered genetic variation, scientists at Newcastle University have found.
Researchers Identify Gene Mutations Underlying Risk for Most Common Form of Parkinson's Disease
Nov 17, 2009 |
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(PhysOrg.com) -- Two genes containing mutations known to cause rare familial forms of parkinsonism are also associated with the more common, sporadic form of the disease where there is no family history, researchers have ...
Genomic research shows Indians descended from two groups
Sep 23, 2009 |
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(PhysOrg.com) -- In a study published in the September 24th issue of Nature, an international team describes how they harnessed modern genomic technology to explore the ancient history of India, the world' ...
Jumping genes, gene loss and genome dark matter
Oct 07, 2009 |
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In research published today by Nature, an international team describes the finest map of changes to the structure of human genomes and a resource they have developed for researchers worldwide to look at the ...
Scientists present first genetic evidence for why placebos work
Jul 20, 2009 |
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usually mere sugar pills designed to represent "no treatment" in a clinical treatment study. The effectiveness of the actual medication is compared with the placebo to determine if the medication works.
Mice living in sandy hills quickly evolved lighter coloration
Aug 27, 2009 |
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In a vivid illustration of natural selection at work, scientists at Harvard University have found that deer mice living in Nebraska's Sand Hills quickly evolved lighter coloration after glaciers deposited ...
Study: H1N1 flu virus ill-suited for rapid transmission, but new strain bears watching, could mutate
Jul 02, 2009 |
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A team from MIT and the Centers for Disease Control and Prevention has found a genetic explanation for why the new H1N1 "swine flu" virus has spread from person to person less effectively than other flu viruses.
Flow of potassium into cells implicated in schizophrenia
May 06, 2009 |
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A study on schizophrenia has implicated machinery that maintains the flow of potassium in cells and revealed a potential molecular target for new treatments. Expression of a previously unknown form of a key ...
Study shows that a combination of common genetic variations can lead to schizophrenia
Jul 01, 2009 |
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A multi-national group of investigators, including a scientist at the University of North Carolina at Chapel Hill, has discovered that nearly a third of the genetic basis of schizophrenia may be attributed ...
First common genetic risk factors for autism demonstrated
Apr 28, 2009 |
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UCLA scientists, in partnership with 30 research institutions across the country, have identified a new gene variant that is highly common in autistic children. And when researchers scrutinized the activity ...
