Articles tagged with Evolutionary Genetics
Researchers discover at least four different modules in the brain dedicated to self-location, each with its own internal GPS-like mapping system. The discovery challenges previous understanding of how the brain organizes abstract functions and opens up new possibilities for memory formation.
The December issue of Genetics Society of America's journal features research on genetic variation in yeast, gene functional trade-offs, and serotonin signaling in C. elegans. These studies explore how genetic variations affect function and provide insights into the evolution of pleiotropy and the mechanism of signaling by serotonin.
A new study published in Genetics reveals that assessing skin cancer risk can be improved by accounting for genetic factors, such as family history and ethnicity. The researchers developed a more precise model for assessing risk using phenotypic and genetic information from over 5,000 participants.
A study published in Genetics Society of America's journal found that Native Americans and Northern Europeans are more closely related than previously thought. The research used statistical tools to show that Neanderthals mixed with modern humans also revealed a common ancestor between Native Americans and Northern Europeans.
A recent study found that nearly three-quarters of gene mutations occurred within the past 5,000 to 10,000 years, indicating a significant impact on human evolution.
Scientists have discovered that microscopic protozoa stole genes from algae to produce energy, leading to the evolution of a new species. This process, called endosymbiosis, reveals a key moment in the history of life on Earth and may have implications for algae biofuel production.
A study of over 1 million DNA variations reveals most harmful protein-coding mutations emerged during the past 5,000 to 10,000 years. This finding highlights the profound impact of recent human evolutionary history on contemporary genetic disorders.
A research team has identified genetic markers for the Bornean elephant using cutting-edge DNA sequencing methodology. The discovery opens new avenues for conserving other endangered species with limited genetic diversity. The study, published in PLOS ONE, marks a significant breakthrough in conservation efforts.
A new gene called miR-941 has been found to play a crucial role in human brain development and may have contributed to the evolution of language and tool use. This unique gene emerged between six and one million years ago, making it a significant discovery in understanding what makes humans different from apes.
A new study by Brown University researchers found that men with more consistently made sperm have better swimming abilities. The research suggests that variability in sperm length may be a sign of trouble with the production process, potentially affecting fertility.
Researchers have identified 71 genetic regions associated with inflammatory bowel disease (IBD), increasing the total number discovered to date to 163. The study reveals that IBD may result from an over-active immune response, which can lead to inflammation and damage in the intestinal tract.
A recent study using computer modelling shed light on the origin of sight in animals, including humans. The researchers found that the ability to detect light developed over a span of 11 million years from a 'blind' opsin ancestor.
CWRU's Maxwell J. Mehlman examines the emerging issues in genetic engineering, balancing innovation with caution. The book discusses the potential for evolutionary engineering, which allows parents to form the next generation by altering reproductive cells to remove disease risks.
A new UCLA study reveals that women in stable but not-so-sexy relationships become more distant and critical during periods of high fertility, according to researchers. Despite this, the negative feelings appear fleeting and do not impact long-term commitment to their romantic relationship.
A recent study published in Science suggests that evolution can be predictable by understanding a species' genes and how external conditions affect proteins. By analyzing DNA sequences from 29 insect species, researchers found that certain traits evolve similarly due to environmental pressures.
Researchers at the University of Veterinary Medicine in Vienna used fruit flies to study adaptation to changing temperatures, finding temporally heterogeneous trajectories of selected alleles. Genetic changes were widespread and rapid, with some genes adapting quickly while others showed little change.
A study found that a gene variant producing efficient arsenic metabolism is common among Atacameño Indian villagers in Argentina, reducing health risks associated with high levels of arsenic. The research suggests human evolutionary adaptation to environmental toxins may vary among populations.
A genetic study has found that Sumatran orangutans have undergone a substantial recent population decline due to deforestation. However, the research also identified critical corridors for dispersal migrations that can help maintain genetic diversity and aid in the species' conservation if protected.
A study published in European Journal of Wildlife Research has confirmed the genetic uniqueness of captive lions at Addis Ababa Zoo in Ethiopia. The research team recommends establishing a captive breeding program to preserve this vulnerable lion population and conserve its genetic heritage.
Research on harvestman spiders found that single male parents of eggs suffer no long-term decrease in fitness compared to females or non-caring males. The study suggests that reduced mortality risk and genetic advantages of improving offspring survival may have favored the evolution of paternal care in insects.
Researchers at Virginia Tech have identified a curious genetic trait in African mosquito species that transmits malaria, suggesting that this species is genetically linked to an older lineage. This discovery could lead to better understanding of the mosquito's capacity to transmit malaria and inform malaria control efforts.
Researchers tracked tumor evolution in a patient with maxillary sinus carcinoma, identifying genetic changes that contribute to drug resistance. The study provides a roadmap for treating this rare and aggressive cancer.
A new study has identified genetic origins of aortic valve disease affecting 10% of cases, shedding light on hereditary component and progression of the disease. The research found rare genetic variants linked to severe health effects and disease processes, with many affected patients carrying multiple variants.
Researchers used DNA analysis to separate hundreds of coral symbionts into distinct species, revealing unique ecological distributions. This breakthrough should improve research into reef-building corals and their complex biology, potentially aiding in the survival of corals under global warming.
This September 2012 issue of the Genetics Society of America's journal features studies on weak selection in molecular evolution, a new method for mapping quantitative trait loci onto phylogenetic trees, and the role of DNA replication defects in causing chromosome rearrangements. Additionally, researchers investigate ultraconserved el...
Researchers identified 33 genes associated with GAA/TTC repeat instability and expansions in yeast. These findings may have implications for human disease due to the conservation of genetic machinery across species.
Researchers have identified a conserved class of genes responsible for the development of double flowers in plants like Thalictrum thalictroides. This discovery sheds light on the evolutionary history of flowering plants and their ability to coevolve with pollinators.
Researchers identified a mutation in the DMRT3 gene, crucial for ambling gaits, pacing and high-speed trotting in horses. In mice, this gene reveals fundamental knowledge about neural circuits controlling leg movements.
Dr. Ley's work on whole genome sequencing in AML has provided unprecedented insights into the disease, highlighting the importance of unbiased methods for discovering cancer-initiated mutations. His research also revealed that most AML mutations are benign background events, with only a handful contributing to pathogenesis.
Ecologists warn of potential unintended consequences of genetically engineered algae for biofuel production. Researchers argue for independent studies and adequate funding to explore potential risks, including survival in the wild, hybridization, and ecosystem disruption.
A recent analysis of avian feather lice reveals that their ancestors first colonized a particular group of birds and then radiated to different habitats, evolving into distinct species. The study found striking similarities in the adaptations of lice living in specific habitats on birds, which are attributed to convergent evolution.
Recent advances in paleogenetics provide new insights into human evolution in Europe, showing that cultural and demographic events have shaped genetic variation among modern-day populations. The study reveals a more diverse range of mechanisms influencing genetic diversity than previously thought.
Researchers found that intervening on behalf of a victim can reduce bullying rates in humans' evolutionary past, leading to greater cooperation, empathy, and egalitarian moral values. This finding supports prior studies showing lower bullying rates in Scandinavian countries.
Researchers studied fruit fly chromosomes to understand the evolution of sex and gamete function. The study suggests that Meiotic Sex Chromosome Inactivation (MSCI) occurs in Drosophila, which has implications for human fertility and disease genetics.
Researchers found that a slow response to reduced fitness accelerates Muller's ratchet, increasing the frequency of clicks. Even in unfavorable conditions, a small proportion of positive mutations can sustain populations, explaining the long-term maintenance of mitochondria.
The study found that Shigella sonnei, a bacterium previously thought to be more common in developing countries, is now spreading globally due to its high levels of drug resistance. The researchers suggest that vaccine development will be crucial in controlling the disease.
Researchers studying live oaks in eastern North America aim to understand how trees adapted to climate change during glacial periods. They believe that genetic changes, rather than extensive morphological alterations, allowed oaks to migrate and thrive in colder climates.
Scientists discovered virus-like genes in the DNA of a commonly studied fruit fly, which could enable research on whether animals hijack viral genes as an anti-viral defense. The study found that several types of fruit flies harbored genes similar to those that code for the sigma virus, a fly virus in the same family as rabies.
Elk and rhinoceros beetles use insulin to grow big horns and attract mates. A study by Michigan State University found that these traits are not handicaps, but rather honest indicators of quality. The research suggests that the males' insulin dependence provides a way for them to show off their strength and suitability as partners.
A recent genomic study of 15 African hunter-gatherers sheds light on human diversity, evolution, and ancient interbreeding. The analysis identifies millions of previously unknown genetic mutations and suggests that different groups evolved distinct traits to adapt to local environments.
A team of researchers has developed a novel method to search gene sequences and identify similar proteins across different kingdoms of life. They found that Actinobacteria, a group of single membrane bacteria, is the last universal common ancestor of all living species.
At the annual meeting of crystallographers, researchers presented groundbreaking studies on X-ray laser technology, deep-sea bacteria's pressure tolerance, and molecular mechanisms underlying bacterial resistance to antibiotics. The discoveries have significant implications for fields such as medicine, genomics, and material science.
Researchers have identified genetic and blood serum markers that can predict the rapid progression of hepatitis C disease, allowing for more effective treatment decisions. Patients with high levels of a specific protein called MCP-1 are at risk for severe liver diseases.
Researchers at Leibniz-Institute DSMZ discovered that Roseobacter clade bacteria can exchange genetic characteristics through plasmids, allowing them to conquer new ecological niches. This horizontal gene transfer enables photosynthesis and enhances survival in diverse ocean habitats.
Amanita mushroom evolution shifts from decomposing to symbiotic tree relationships, resulting in lost genetic capacity, according to Harvard researchers. The study reveals the transition came at a steep price, with genes associated with breaking down cellulose being sacrificed.
A study published in the Genetics Society of America's journal found that genes responsible for immune response at youth are almost completely different from those in middle age. This discovery opens doors to understanding genetic interactions underlying why older people struggle more with infections.
Researchers inserted ancient gene into modern-day E. coli and observed its evolution over 1,000 generations. The results showed that the ancient gene did not mutate to become more similar to its modern form, but rather the bacteria adapted through novel mutations.
Scientists have discovered a new plant species in Scotland that has overcome infertility and formed a new hybrid. This rare example reveals the process of polyploidization, allowing the plant to restore fertility and thrive in the wild.
The CIPRES Science Gateway is helping researchers unravel the enigmas of phylogenetics by making it possible to compare similarities and differences in DNA among large numbers of species. Phylogenetic studies are essential for understanding the history of life on earth, population changes, and evolutionary theories.
Scientists discovered that a widespread plant pest arose from the fusion of two unknown parent species just a few hundred years ago. The study reveals new insights into fungal evolution, showing that hybridization can lead to rapid speciation in plants and fungi.
A study published in Aging Cell found that naked mole rats have high levels of the neuroprotective protein NRG-1, which is linked to their unusually long lifespan. The research suggests that this protein may be a key factor in maintaining brain health and preventing age-related decline.
A new model suggests that frequency-dependent selection fosters genetic diversity by allowing different mutations to coexist and interact. This leads to higher diversity within populations, despite the potential decline in average fitness.
Researchers have recovered part of the genome of two individuals living in the Mesolithic Period, 7000 years ago. The study indicates that current Iberian populations don't come from these groups genetically. The genome found is the oldest from Prehistory and exceeds Ötzi, the Iceman, in 1700 years.
A classic study on male and female promiscuity has been called into question after UCLA biologists repeated the experiment using the same methods as the original. The team found that Bateman's conclusions about the relationship between mate number and offspring fitness were likely flawed due to a bias in his methodology.
Researchers found uncoordinated gene expression in sponges, suggesting a mechanism for the evolution of neural synapses may be more ancient than thought. The study sheds light on the origins of the nervous system and its development in different animal species.
A new study published in Genetics reveals a gene in Caenorhabditis elegans, similar to a human gene correlated with Alzheimer's disease, is involved in multiple metabolic pathways, including insulin. The discovery suggests that this gene plays a role not only in Alzheimer's but also in diabetes.
Research team studied genetic diversity of coelacanths in Africa, revealing low genetic diversity but specific patterns in certain regions. The study shows that coelacanths can continue to develop and adapt to new conditions despite their slow evolutionary rate.
Researchers at the University of East Anglia have discovered genetic differences between two Cryptosporidium parasite species. This breakthrough enables the development of a new gold standard test to quickly distinguish between the two species, allowing for earlier detection of outbreaks and tracing of their source.
Researchers at UCSB have successfully synthesized a semiconductor material through genetic engineering and molecular evolution. By directing the evolution of enzymes, they created new mineral architectures with unique properties, opening up possibilities for specialized materials.
A new method called comparative epigenomics uses interspecies comparison to determine the purpose of genes. By analyzing epigenomic marks in pluripotent stem cells, researchers were able to identify conserved epigenetic markers that can annotate the genome and clarify its regulatory function.