Stanford scientists have found a way to modify pairs of cancer-related genes in the lungs of mice and then precisely track individual cells of the resulting tumor – a combined technique that could dramatically speed up ...
Apr 3, 2018
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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.
Dec 5, 2012
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Genetic diversity of the malaria parasite in pregnant women and children declined in an area targeted for malaria elimination in Mozambique, according to a study led by the Barcelona Institute for Global Health (ISGlobal). ...
Mar 19, 2024
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In the most comprehensive genetic study of the people living in the Eastern Highlands of Papua New Guinea to date, researchers from Papua New Guinea and the U.K. reveal the complex population structure and migration patterns ...
Mar 19, 2024
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Northwestern Medicine investigators have revealed new insights into the impact of neuronal structural diversity on neural computation, the basis of brain function, according to a recent study published in the Proceedings ...
Feb 20, 2024
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A biobank for all, in which a person from any background could find a bone marrow donor for a stem cell transplant, is a major goal for stem cell science. While repositories of cell lines that could be a match for most patients ...
Sep 28, 2023
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Scientists around the world are growing more concerned about a newly emerging subvariant of the SARS-CoV-2 virus—named BA.2.86 and referred to generically as "Pirola"—according to Mun-Keat Loo, international features ...
New research by academics from Royal Holloway and The University of Western Ontario suggests that fetal cells in pregnant mothers, left from previous pregnancies with more than one partner, could raise the risk of health ...
Aug 25, 2023
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Hardship experienced by mothers during their own childhood or during pregnancy is reflected in the composition of their 2-year-old children's gut microbiomes, reports an international team of scientists led by UCLA psychologists.
Jul 20, 2023
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A team of bioinformatics researchers affiliated with multiple institutions in the U.S. and Aarhus University in Denmark is proposing a new metric to quantify genetic dissimilarities between an individual and a training population. ...
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.
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