Articles tagged with Evolutionary Genetics
A new study by Penn State University finds that colugos, also known as flying lemurs, are the closest living relatives of primates. The researchers used molecular and genomic data to analyze the evolutionary relationships among three groups: primates, colugos, and tree shrews.
University of Michigan scientists found a significant connection between the lipid PI(3,5)P2 and neuronal health, revealing potential treatments for neurodegenerative diseases like Alzheimer's. Lowered levels of this signaling molecule lead to massive neurodegeneration in mice.
Research by biologists at the University of Bonn found that older coal tit males produced significantly more 'cuckoo kids' than younger males. In contrast, younger males father only 0.3 extra-marital offspring on average.
Two scientists report a new type of mouse replaced an old type in Volo Bog between 1976 and 2001, with genetic differences apparent in just 25 years. The study suggests that environmental changes can drive rapid adaptation in animal populations, highlighting the need for conservation efforts.
Researchers have identified same-sex mating in nature through analysis of natural hybrids and laboratory observations, shedding light on the evolution of Cryptococcus neoformans population structure. The study provides new insights into the genetic and environmental factors driving the current population's sex-ratio imbalance.
Researchers found two genetic SNPs influencing metabolic efficiency in Pima individuals, which helped them survive the Sonora desert's harsh environment. These findings suggest that similar SNPs may contribute to obesity globally.
UCSB researchers have discovered a key milestone in the evolution of animal vision, finding evidence of light-sensitive genes in ancient aquatic animals. The study, published in PLoS ONE, suggests that animal vision emerged around 600 million years ago.
A team of researchers has demonstrated how a single gene in yeast divides and adapts to improve its environment, showcasing the driving force of natural selection. This study provides the most basic view of how organisms evolve to better adapt to their environments.
Researchers develop formula to study linguistic evolution, predicting irregular verbs will regularize at a rate inversely proportional to their usage frequency. The most common irregular verbs, such as 'be' and 'think', are expected to remain irregular for thousands of years.
A KGI professor's research reveals a mechanism for the self-repair of DNA at jumping gene locations, challenging instability theories. The study provides insights into the evolution of moveable genetic elements and their implications for plant genetics and molecular evolution.
Researchers at UF discover a powerful link between protein evolution and metabolic rate across various species, including fish and mammals. The study reveals that rates of protein evolution are strongly influenced by individual metabolic rates.
Researchers found that quail males who learned to associate a stimulus with access to a female were more likely to fertilize eggs, increasing their reproductive success. The findings suggest that learning plays a significant role in reproductive fitness and evolution.
A new study by Oregon State University reveals that rearing steelhead trout in hatcheries causes a dramatic drop in their ability to reproduce in the wild, with reproductive success dropping by up to 40% per generation.
The study found that plants without the linamarase enzyme lack the Li gene, while those with it produce cyanogenic glucosides. Researchers are testing hypotheses on why acyanogenic plants occur in cold climates, including the possibility of plant suicide due to frequent frosts.
The complete genetic sequence of Giardia lamblia has been completed, revealing opportunities for new drug and vaccine targets. The parasite's genome shows unusual proteins that could be exploited to treat or prevent infections.
Researchers at the University of Helsinki discovered that a weak inhibitory cascade in mouse molars may cause the last molar to develop in humans. They developed a mathematical model predicting tooth proportions and numbers across various species, including humans.
A new UC Davis study explores how competition among genetically varied plants relates to species diversity, finding that diversity within a species is necessary for maintaining diversity among species. The research also highlights the importance of preserving biodiversity in plant communities.
Research suggests that genetic factors influence women's choices about parenthood, and that this may lead to a shift towards more traditional family structures. Dr. Lonnie Aarssen argues that biological evolution will drive future generations of women towards having children as a priority.
Research found strong associations between several genes and schizophrenia, with evidence of positive selection on genes like DISC1, DTNBP1, and NRG1. This supports the theory that schizophrenia represents a maladaptive by-product of human evolution.
The study used knockout mice to test the hypothesis that ultraconserved elements are vital for life, but surprisingly found that mice lacking these elements were viable and fertile. The results suggest that the presence of ultraconserved elements is not required for organism viability.
Researchers found that the genes responsible for color vision in aye-ayes are fully functional, contradicting the long-held theory that nocturnal mammals lose color vision over time. The study sheds light on the evolution of color vision and highlights the importance of examining rare and endangered species.
A study by Cardiff University scientists suggests that human activities such as deforestation and poaching are driving the decline of the giant panda population. The research finds that conservation efforts should focus on habitat restoration and protection to ensure the species' survival.
Researchers used state-of-the-art techniques to recreate an ancient human protein, tracing its evolution and discovering how it acquired a crucial new function. By analyzing the protein's atomic structure, scientists identified seven key historical mutations that recaptured the protein's present-day response to cortisol.
Researchers at Michigan State University found that clones with similar genetic traits outperformed those with varied genetics, producing more flowers and potentially increasing reproduction. The study suggests that a gene called Erecta plays a role in this variation, but further research is needed to confirm the findings.
Research finds cryptic species hiding in plain sight across all major branches of the animal kingdom, defying geographical and taxonomic expectations. DNA analysis reveals genetic divergence among similar-looking animals, highlighting a significant underestimation of global biodiversity.
A new study has identified a key genetic function involved in wing formation in fruit flies, providing insight into the internal laws regulating embryo development. The research uses mathematical modeling to simulate biological systems and confirms the stability of this gene network across evolution.
A study by Johns Hopkins researchers found that neutral genetic drift contributed significantly to the human genome, with mitochondrial DNA elements accumulating and spreading across populations. The study suggests these neutral elements had little impact on human health and fitness.
Scientists identify rapid evolution of plant defense genes as a cause of hybrid incompatibility, leading to sterility and defective offspring. This phenomenon may contribute to the formation of new species through gradual genetic incompatibilities.
A study from Rice University reveals that cooperative single-celled amoebae use family ties to prevent cheaters from undermining their colonies' health. By associating with kin, the amoebae's social system prevents the spread of selfish mutants.
Researchers at the University of Oregon discovered a fundamental genetic mechanism in a marine worm that determines cell diversity and plays a role in cancer. The beta-catenin signaling pathway was found to be highly conserved throughout the animal kingdom.
New study reveals chimpanzees act altruistically toward genetically unrelated conspecifics, even when no reward is expected. This finding suggests the evolutionary roots of human altruism may be deeper than previously thought, reaching back to the last common ancestor of humans and chimpanzees.
A study reported in Current Biology shows that captive chimpanzees can acquire new traditions and spread them to other troops. This suggests a considerable capacity for cultural spread of innovations among chimpanzees, similar to what is seen in the wild.
Researchers found a correlation between horn growth and genetic diversity in alpine ibex, with greater diversity associated with longer horn lengths. The study suggests that genetic quality becomes more apparent as the animal ages, supporting the mutation accumulation theory of ageing.
Researchers at the University of Leeds discovered that leaf-cutting ant larvae can switch development based on environmental stimuli and colony needs. This flexible genetic coding allows colonies to adapt to changing workforce demands.
A team of international scientists has described the rules that govern how plants arrange flowers into branching structures, known as 'inflorescences'. The new unifying theory provides an explanation for the diversity of inflorescences in nature, including regional variations and developmental patterns.
The first issue of the HFSP Journal showcases innovative interdisciplinary research at the interface between biology and physics. The journal features articles on topics such as magnetoreception, ERKII signaling, and protein evolution, highlighting the intersection of multiple scientific disciplines.
Scientists found that genes present in primitive bony fish like paddlefish are also found in tetrapods, overturning the long-held theory of limb acquisition. The study reveals a pattern of gene activity similar to that seen in tetrapod limbs in paddlefish fins.
A study by Cardiff University found that DNA similarity between African bushbuck populations can reveal similarities and differences in ecoregions. The research identifies 28 key regions for the species, providing a framework for pan-African conservation efforts.
Researchers analyzed 30 years of data to understand how initial processes shaped the virus's geographic spread, revealing key factors like mountain ranges and rivers affecting its expansion. The study provides insights into the epidemiology of rabies and other emerging zoonotic diseases.
Scientists found a new species of sea anemone, Anthosactis pearseae, living on the carcass of a dead whale 1.8 miles below sea level. The anemone is small and white, with roughly uniform tentacle length, and may provide clues about human impact on deep-sea ecosystems.
Researchers found that all hooded seal populations worldwide exhibit identical genetic diversity, indicating they intermingle and mate across populations. This discovery sheds light on the mysterious animal's behavior, with potential implications for conservation efforts.
Researchers have discovered a genetically pure Pinta tortoise, potentially leading to species recovery for the endangered giant Galápagos tortoise. The findings offer hope that Lonesome George's legacy can be transformed from an enduring symbol of rarity into a conservation success story.
Researchers created a supermap of the H5N1 virus using genetic, geographic, and evolutionary data to predict future outbreaks. The map revealed no significant association between mutations in surface proteins HA and NA and specific host types.
Researchers at Yale University have identified a tortoise with half its genes in common with Lonesome George, the famous Galápagos tortoise. The discovery raises hopes for a conservation success story and potentially sets up a captive breeding program to recover the species.
Scientists have found that a group of sea snails can regain the lost larval stage, breaking Dollo's Law. This discovery suggests that animals may carry the potential for evolutionary change around with them.
A recent study on chimpanzee genetics reveals three distinct groups with considerable genetic variation, which has important implications for conservation efforts. The research team found that the traditional geography-based sorting of chimps into western, central, and eastern populations is supported by significant genetic differences.
The completed Rhesus macaque DNA sequence has advanced understanding of primate evolution and will enhance medical research in various fields. The analysis revealed examples of duplicated segments, expanded gene families, and individual genes influenced by natural selection.
A new study has found that the ancestors of modern mammals did not quickly evolve and spread to fill empty niches following the mass extinctions of dinosaurs. Instead, diversification rates dropped and stayed low for 40 million years, with modern mammal orders emerging around 50-55 million years ago.
A new study published in PLoS Genetics used computer simulations to trace genetic changes over thousands of generations in a simulated population, testing the effectiveness of statistical genetic methods in identifying multiple genes causing complex diseases. The researchers found that known methods are limited and identified which met...
Researchers successfully engineered mice to see colors beyond the normal range by introducing a single human gene that codes for a light sensor. This breakthrough demonstrates the flexibility of the mammalian brain in processing sensory information, opening new avenues for understanding the evolution of color vision.
Researchers found that asexual bdelloid rotifers have evolved independently into distinct entities, with genetic and morphological cohesion within populations and divergence between them. This suggests that factors other than interbreeding control species cohesion and divergence in these organisms.
A genetic analysis of vespid wasps reveals that eusociality evolved separately in two groups, contradicting a long-held model. The study adds weight to earlier findings and sheds light on the complexity of evolutionary processes.
A UCSB study found evidence of a nonconscious mechanism in the human brain that identifies genetic siblings based on cues guided by hunter-gatherer ancestors. This mechanism regulates feelings of altruism and aversion to incestuous relations, suggesting natural selection played a role in its evolution.
Studies on Mexican cavefish reveal distinct evolutionary pathways for eyes and pigmentation. Evolution by natural selection drives eye regression due to metabolic costs, while genetic drift influences pigment cell density variations.
A new statistical method helps choose animals that are more congenial in groups, improving productivity and animal well-being. The tool aids in predicting how social interactions impact the natural evolution of species, with potential applications for securing the world's food supply.
A new study suggests that human males have evolved mechanisms to outcompete rivals for fertilization, even after sex. This phenomenon, dubbed 'sperm competition,' can lead to increased sperm count and more aggressive sexual behavior in response to perceived infidelity.
A new model proposes that sexual differentiation may exact a high biological cost, reducing function of mitochondria and influencing longevity. The model predicts which genes regulate life span and suggests testable hypotheses for exploring the biggest question in aging research.
Researchers found that splice-enhancer domains, which code for specific amino acids, influence protein evolution and are subject to selective pressure. Smaller exons near intron-exon boundaries also evolve more slowly.
Recent studies on animal migration have gained insights into the evolution of this complex phenomenon, yet much remains unknown. Advances in technology are helping scientists better understand the mechanisms behind migration, including the role of genetic correlations in determining future evolutionary changes.
New research by Rice University scientists reveals that horizontal gene transfer (HGT) contributes to the speed of evolution, allowing life forms to adapt faster. The study proposes a mathematical model that accounts for HGT and its impact on the dynamics of evolution.