Articles tagged with Evolutionary Genetics
Researchers analyzed blood samples of chickens from the same generation to reconstruct how mitochondrial DNA passed from mothers to daughters. The study found that evolution occurs much faster than previously believed, with a rate of change in mitochondrial genomes estimated at around 2 percent per million years.
A recent University of Virginia-led study found that naked mole-rats are not genetically isolated and are actually part of larger wild populations with diverse genetics. This challenges the long-held assumption about their social behavior and mating habits.
A new study on supermarket queuing behavior found that customers are more willing to cooperate if the recipients can save significant waiting time. The authors propose a model of indirect reciprocity, where potential helpers' readiness to cooperate depends on their image of the recipient.
A team led by Dmitry Korkin will analyze vast genomic data to find common genetic elements, known as LIMEs, that have remained unchanged over millions of years. These sequences are likely to perform vital functions in cells and provide insight into the roles they play.
Researchers have identified ORF0 sequences in human and chimp DNA that may produce hundreds of previously unknown proteins. The discovery suggests a new mechanism for generating novel proteins, which could be beneficial or disease-causing, depending on the evolutionary context.
A study identified significant DNA differences in the human kallikrein cluster among Eastern Asian populations, including those related to KLK4 gene activity. These findings may contribute to unique dental traits and a lower risk of skin conditions like eczema.
A new study reveals that spiders' knees evolved from a duplicated gene called dac, allowing for a unique leg structure. The research team discovered that the dac2 gene is specific to spider development and plays a crucial role in forming the kneecap.
Research reveals that human activities, particularly deforestation and fires, are driving genetic differentiation among the Udzungwa red colobus monkey in Tanzania. The study's findings suggest that these changes are threatening the species' survival, as smaller populations become isolated and more susceptible to extinction.
A new study from Aarhus University reveals that low birth weight is associated with low levels of social trust in adulthood, while high birth weight is linked to high levels of trust. The researchers suggest that factors linked to the embryonic stage, such as nutrition and environment, may play a role in shaping adult behavior.
Researchers have found that artificially selected microbiomes can improve plant growth in genetically identical plants. This method of root microbiome engineering uses bacteria from the roots of large plants and transfers them to other plants, leading to improved growth over time.
Researchers discovered genetic adaptations in Greenlanders that allow them to thrive in extreme environments, including changes related to fat synthesis and a mutation affecting height. The study highlights the importance of studying small and historically isolated populations like the Inuit.
A Pitt researcher used gene regulatory networks to uncover the origins of a recently evolved structure in male fruit flies, finding that it was created by reusing existing networks during development. This discovery sheds light on how complex animal forms arose and challenges the idea that new structures must be encoded by new genes.
A study by Liverpool School of Tropical Medicine researchers reveals that evolution can be highly predictable in terms of developing toxin resistance. Convergent evolution of two amino acid changes in a specific gene leads to the development of toxin resistance in various animals, including insects, reptiles, and mammals.
Researchers explore gene network that guides limb development in mammals, finding it varies little in early stages and more widely later on. This pattern makes it easier for evolution to tweak rather than remodel limb structure.
A study published in Nature found that guppies evolved 135 genes in response to a new environment, with most changes affecting biological processes like metabolism and immune function. However, the initial response was often opposite to the eventual evolutionary change, suggesting that genes can adapt quickly in the short term.
A study found that climate change can rapidly alter plant genetic diversity, but also enable an 'evolutionary rescue' through increased adaptability. The research suggests that genetic diversity may buffer plants against harmful effects of climate change.
A large-scale genetic study of marijuana and hemp revealed a lack of knowledge about cannabis due to its controlled status. Researchers found that cannabis plants are often incorrectly labeled and breeders' claims about strain ancestry are not accurate.
A Harvard University collaboration has developed a 3D model of solid tumors that reflects both their three-dimensional shape and genetic evolution. The model explains why cancer cells share an unusually high number of genetic mutations and how drug resistance evolves, shedding light on tumor growth and evolution.
Researchers found that lager yeast, used in 94% of beer production, originated from the accidental hybridization of Saccharomyces cerevisiae and S. eubayanus yeasts around 500 years ago. The study reveals how these natural processes led to the development of a yeast that could thrive in cold temperatures.
A new study suggests that dietary carbohydrate, particularly in the form of starch, was critical for the accelerated expansion of the human brain over the last million years. The research, led by Dr. Karen Hardy, highlights the importance of cooked starchy foods and higher salivary amylase genes in fueling brain growth.
WSU researchers discover that environmental factors can prompt genetic mutations through epigenetics, changing our understanding of disease and evolution. The study found increased genetic mutations in offspring exposed to the fungicide vinclozolin, suggesting a more significant role for environment in driving intergenerational changes.
Researchers have recreated the evolutionary lineage of AAVs to reconstruct an ancient viral particle that is highly effective at delivering gene therapies. The approach could lead to designing a new class of genetic drugs that are safer and more potent than those currently available.
Researchers identified the crucial mutation that stripped away teosinte's hard casing, exposing the edible kernel. This genetic change allowed for the domestication of maize, leading to its widespread cultivation and impact on human societies.
A study of 228 butterfly species in the Iberian Peninsula suggests that up to 28% could be entirely new to science, highlighting the need for conservation efforts and genetic identification tools. This DNA analysis will aid in differentiating between morphologically similar species and inform priority conservation strategies.
The kiwi genome sequencing reveals several genes involved in colour vision are inactivated, while the diversity of odorant receptors is higher than in other birds, indicating a reliance on their sense of smell for foraging. Genetic changes occurred about 35 million years ago, reflecting the kiwi's adaptation to its nocturnal lifestyle.
Researchers found that two neighboring chimpanzee groups used distinct tool lengths despite identical army ant species availability, indicating cultural knowledge generated small-scale diversification. This study provides insights into what drives cultural differences in chimpanzees and sheds light on human cultural evolution.
BEACON researchers explore evolutionary dynamics of disease, antibiotic resistance, and climate change using digital organisms, aiming to develop robust solutions for industrial and societal problems. The grant renewal enables further breakthroughs in understanding and harnessing evolution in action.
A study on White-breasted nuthatches found that environmental factors, such as temperature and rainfall, drive genetic differences between populations, rather than geographical distance. This discovery challenges the traditional view of isolation-by-distance and provides insights into species adaptation to unique habitats.
A comprehensive genome analysis of 7 melon varieties provides new insights into phenotypic variability and selective breeding. The study identifies 902 genes potentially affected by DNA structural variations, including disease resistance and sugar metabolism.
A single genetic mutation in the tga1 gene led to the formation of naked kernels, allowing for easier consumption. This discovery provides insights into the rapid evolution of corn traits through minor genetic alterations.
Scientists found that a single generation of the US fruit fly can undergo a significant genetic shift, allowing it to infest apples and threaten the $7 billion apple industry. The study's findings suggest that environmental changes can drive evolutionary adaptations in just a few generations.
Researchers sequenced the genomes of two extinct woolly mammoths and three modern Asian elephants, identifying genetic variants associated with traits such as hair development, fat storage, and temperature sensation. The study found that these changes likely enabled the mammoths to adapt to harsh Arctic environments.
A study of populations worldwide suggests that genetic diversity is linked to increased height and better cognitive skills, as well as higher levels of education. However, this diversity has no effect on factors like high blood pressure or cholesterol levels.
Researchers discovered a buffering mechanism that protects animals from severe genetic mutations, which may hold the key to understanding human diseases. By identifying these mechanisms, scientists can develop new treatments and improve clinical practice.
A recent Australian and Canadian study on fruit flies reveals that too much male sexual attention hinders the species' adaptation to new conditions. The research found that sexually attractive females were overwhelmed by male suitors, leading to a decrease in their egg-laying ability.
Researchers used DNA barcoding to study Antarctic sponge diversity and revealed a highly diverse group of species, comparable to tropical communities. The genetic analysis suggests that these sponges developed as an isolated population, likely descended from ancestral forms in Gondwana waters.
A study found that a single gene mutation causes the distinctive head crest in pigeons and domesticated ringneck doves, with similar mutations occurring in both species.
Researchers analyzed genetic data from butterflies and cabbage plants to understand the co-evolutionary dynamics. They found that new gene copies played a key role in this process, enabling plants to develop toxic compounds that deter insects.
Researchers analyzed U.S. flu cases from 2003-2013 and found correlations between genetic distance of flu subtypes and geographic distance using transportation data. The study suggests that mobility patterns, rather than geographic proximity, play a key role in predicting the spread of influenza epidemics.
A study highlights the importance of coupling natural history collections with next-generation sequencing to obtain large molecular data sets for species-rich groups. Large genomic data sets are becoming increasingly obtainable, but the bottleneck shifts to the number of species and individuals that can be included in the study.
A new study reveals how a common species of diatom adjusts to sudden and long-term increases in carbon dioxide. The research found that diatoms decrease photosynthesis and respiration to balance the cell's energy budget when CO2 levels remain high for a long time.
Researchers at Ruhr-University Bochum discovered that coral colonies have higher genetic diversity than assumed, with 24-47% of polyps being genetically different. This increased diversity may help corals adapt to environmental changes, but is it sufficient to compensate for the devastating effects of climate change?
Researchers investigate how sex chromosomes allow gene dosage imbalances without negative effects, with a focus on butterflies and moths as model species. The goal is to understand the mechanisms of 'sex chromosome dosage compensation' (SCDC) in different species.
A new study reveals that Egypt was the major gateway out of Africa, with migrants following a northern route. The analysis of 225 genomic sequences from Ethiopians and Egyptians provides crucial insights into early human evolution.
A new study reveals that the panther chameleon, found only in Madagascar, is composed of 11 different species. Genetic analysis and colour patterns confirmed strong genetic structure among populations, with low interbreeding among lineages.
A study led by Mount Sinai researchers compares flu viruses to the measles virus to identify key genes that can't be changed. This could lead to the development of universal flu vaccines and improved protection against emerging viral threats.
Researchers discovered hundreds of genes from an ancestor shared by humans and yeast that remain unchanged over time. The study enables the use of humanized yeast to better understand genetic disorders and test new therapies.
A new genomic study of bee species found that gene regulation and network complexity are linked to the evolution of social complexity. The research revealed changes in gene activity and DNA methylation as social behavior increased, indicating a 'collective genome' less vulnerable to environmental changes.
A study examines the effects of arranged marriages on genetic diversity, finding that Rindi people's relaxed compliance with their marriage rules produces a genetic diversity similar to random mating. The researchers developed an open-source tool called SMARTPOP to analyze other marriage rules worldwide.
Biologists from KU Leuven found that water flea populations can rapidly adapt to rising temperatures and increased heat wave frequencies. The study, using 'resurrected' eggs, showed a 3.6°C increase in critical temperature for activity.
A team of researchers found that limiting migrations among populations of bacteria produced better adaptations and allowed for a wider variety of peaks, enabling the organisms to adapt to their environment more effectively. This 'tortoise-hare' pattern highlights the importance of slow and steady evolution in achieving long-term success.
Scientists from the University of Chicago identified a newly-evolved gene, panish, which determines head-to-tail polarity in midge fly embryos. This discovery suggests that genetic changes to fundamental biological processes occur more often than previously thought, and opens new research avenues.
Wild-type zebrafish outcompete genetically modified Glofish for female mates due to aggressive mating behavior, resulting in the rapid decline and eventual disappearance of the GM trait. The study's findings support the idea that mate competition drives natural selection more effectively than mate choice.
Researchers Jitka Polechova and Nick Barton propose a new theory on why species can't adapt to wider environmental conditions. Their findings suggest that sharp range limits can form even in environments with smooth changes, due to random fluctuations in gene frequencies.
A new study uses fossil data to predict that most rodent species will evolve continuously growing molar teeth over the next 50 million years. The researchers found evidence that many species possess the potential for acquiring dental stem cells, which are required for continuous tooth growth.
A new paper by Dr Michael Weale from King's College London argues that Patrick Matthew deserves recognition alongside Darwin and Wallace as an originator of evolution by natural selection. Matthew's work, published in 1831, captures a valuable aspect of the theory that wasn't clear in Darwin's version.
A new study published in the Genetics journal estimated that humans carry an average of one to two recessive disease mutations, which can cause severe genetic disorders or prenatal death. The study used a unique community's detailed family histories and genealogical records to estimate the number of mutations per person.
Researchers found that genetic mutations selectively shut down genes responsible for red pigments, leading to variations in berry color. This process can result in clonal diversity and impact other vegetatively propagated plants.
A new study from the University of Guelph found that maternal genetic effects play a significant role in determining the fitness of squirrel offspring. Genetically gifted mothers tend to give birth earlier, have more successful pups, and exhibit other traits that contribute to their offspring's success.
Scientists have discovered a new virus infecting archaea beneath the ocean floor, which selectively targets one of its genes for mutation. The study also reveals that these microorganisms use a novel mechanism to accelerate genetic adaptation, targeting at least four distinct genes, and this process may be key to their survival.