News tagged with genetic diversity
Genetic diversity within tumors predicts outcome in head and neck cancer
A new measure of the heterogeneity – the variety of genetic mutations – of cells within a tumor appears to predict treatment outcomes of patients with the most common type of head and neck cancer. In the May 20 issue ...
Cancer
May 20, 2013 |
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AB blood type strong risk factor for venous blood clots
The non-O ABO blood type is the most important risk factor for venous thromboembolism (blood clots in veins), making up 20% of attributable risk for the condition, according to a new study in CMAJ (Canadian Medical Associati ...
Diseases, Conditions, Syndromes
Feb 04, 2013 |
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A new genetic fingerprint lives in your belly
Our bodies contain far more microbial genes than human genes. And a new study suggests that just as human DNA varies from person to person, so too does the massive collection of microbial DNA in the intestine.
Medical research
Dec 05, 2012 |
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Common enzyme deficiency may hinder plans to eradicate malaria
In malaria-endemic countries, 350 million people are predicted to be deficient in an enzyme that means they can suffer severe complications from taking primaquine, a key drug for treating relapsing malaria, according to a ...
Diseases, Conditions, Syndromes
Nov 13, 2012 |
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Novel type 2 diabetes genetic study involves five major ancestry groups
A consortium of scientists who are taking a novel approach in their research to detect the genetic variations that predispose individuals to type 2 diabetes provided an update of their findings at the American Society of ...
Genetics
Nov 08, 2012 |
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Researchers identify unexpected bottleneck in the spread of herpes simplex virus
New research suggests that just one or two individual herpes virus particles attack a skin cell in the first stage of an outbreak, resulting in a bottleneck in which the infection may be vulnerable to medical ...
Medical research
Nov 05, 2012 |
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India fights to protect its traditional home remedies
For centuries, Indian housewives have used homemade remedies based on cow's milk to cure constipation—but in 2009 Swiss giant Nestle applied for a patent to protect a similar product of its own.
Medications
Oct 14, 2012 |
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Study reveals prehistoric journey of hepatitis B
(Medical Xpress)—A new study has revealed how the spread of hepatitis B coincides with dates of human migration throughout history, starting around 40 000 years ago. The study could provide a framework ...
Diseases, Conditions, Syndromes
Oct 11, 2012 |
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EU unveils measures to combat biopiracy
The European Union on Thursday set out proposals aimed at thwarting the illegal use of genetic resources and traditional medicine, a practice known as bio-piracy.
Other
Oct 04, 2012 |
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Key immune cell may play role in lung cancer susceptibility
(Medical Xpress)—Why do many heavy smokers evade lung cancer while others who have never lit up die of the disease? The question has vexed scientists for decades.
Cancer
Sep 21, 2012 |
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In heterosexuals, transmitted HIV strains often resemble original infecting virus
A new study has found that even though HIV diversifies widely within infected individuals over time, the virus strains that ultimately are passed on through heterosexual transmission often resemble the strain of virus that ...
HIV & AIDS
Sep 20, 2012 |
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Gypsy study unravels a novel ataxia gene
A WA study of an isolated population of Eastern European Gypsies known as "Bowlmakers" has unlocked clues about a serious developmental disease - congenital cerebellar ataxia.
Genetics
Aug 17, 2012 |
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Sequencing of malaria genomes reveals challenges, opportunities in battle against parasite
Genetic variability revealed in malaria genomes newly sequenced by two multi-national research teams points to new challenges in efforts to eradicate the parasite, but also offers a clearer and more detailed picture of its ...
Genetics
Aug 05, 2012 |
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Methods developed to enable large-scale analysis of malaria parasite genomes from patient blood samples
Researchers have developed a new technique to identify hotspots of malaria parasite evolution and track the rise of malarial drug resistance, faster and more efficiently than ever before.
Medical research
Jun 13, 2012 |
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New genetic method pinpoints geographic origin
(Medical Xpress) -- Understanding the genetic diversity within and between populations has important implications for studies of human disease and evolution. This includes identifying associations between genetic variants ...
Genetics
May 24, 2012 |
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Genetic diversity
Genetic diversity is a level of biodiversity that refers to the total number of genetic characteristics in the genetic makeup of a species. It is distinguished from genetic variability, which describes the tendency of genetic characteristics to vary.
The academic field of population genetics includes several hypotheses and theories regarding genetic diversity. The neutral theory of evolution proposes that diversity is the result of the accumulation of neutral substitutions. Diversifying selection is the hypothesis that two subpopulations of a species live in different environments that select for different alleles at a particular locus. This may occur, for instance, if a species has a large range relative to the mobility of individuals within it. Frequency-dependent selection is the hypothesis that as alleles become more common, they become less fit. This is often invoked in host-pathogen interactions, where a high frequency of a defensive allele among the host means that it is more likely that a pathogen will spread if it is able to overcome that allele.
For more information about Genetic diversity, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
