Articles tagged with Evolutionary Genetics
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.
A new Northwestern University study suggests that children of older fathers inherit longer telomeres, which may promote slower aging and facilitate extension of lifespan. The association is cumulative across multiple generations, offering insights into the evolution of aging.
Researchers found that direct reciprocity alone is insufficient for high levels of cooperation, emphasizing the need for population structure. Repetition can also boost cooperation when individuals interact with similar types, but excessive repetition can harm it.
Researchers found that parasitic flowers share large parts of their genome with host vines through horizontal gene transfer, and some borrowed genes are likely functional. The process may convey an evolutionary advantage to the flowers, which have replaced vertically inherited copies.
Researchers will create an open, dynamic evolutionary framework to continuously update the tree of life, incorporating new biodiversity data. Computational tools will enable scientists to visualize and analyze the entire tree, facilitating comparative biology research and discovery of new medicines.
Researchers found strong relationships between aggressive behavior and individual variation in genes related to testosterone processing in the brain. The study suggests that selection can shape aggression through changes in gene expression, independent of circulating testosterone levels.
Researchers found that plant species reproducing sexually have stronger disease resistance due to increased adaptive evolution of the chitinase gene. This supports the theory that sex provides a genetic advantage in adapting to environmental changes.
A handful of genetic changes in early mammalian development created the complex structures of the human brain, including fine motor skills and cognitive abilities. Researchers identified key regulatory DNA regions that control the formation of the corticospinal system.
A team of researchers has developed a new genetic method called spatial ancestry analysis (SPA) that can model genetic variation in two- or three-dimensional space. SPA allows for the modeling of the spatial distribution of each genetic variant, enabling individuals to be localized on a world map based on their genetic information alone.
A new study by Durham University found that modern dog breeds have little in common with their ancient ancestors due to thousands of years of cross-breeding. The research analyzed genetic data from 1,375 dogs and showed that even breeds labeled as 'ancient' are not closer to the first domestic dogs.
Researchers discovered that colorful butterflies share traits to enhance their survival, including a rich repertoire of genes for olfaction and chemosensation. This cross-breeding allows them to acquire superior wing colors more quickly than evolving from scratch.
Researchers from the Heliconius Genome Consortium sequenced the Postman butterfly's genome and found promiscuous sharing of large DNA regions among closely-related species. This study reveals how hybrids can introduce new genes that help populations adapt, changing our understanding of adaptation in evolution.
A recent study by Yale University researchers identified a pattern of gene activity in the human brain associated with autism and learning disabilities. The findings suggest that the same evolutionary mechanisms that enabled human cognitive abilities may also contribute to psychiatric disorders like autism.
Researchers found that birds with multiple plumage colour forms evolve into new species faster than those with only one colour form. The study, published in Nature, used decades of data and genetic information to confirm a 60-year-old evolution theory.
Researchers have found that sex-linked chromosomes, particularly the W chromosome in female chickens, play a vital role in predicting fertility. The study's results support the idea that these chromosomes are unlikely to become extinct due to their importance in survival.
Researchers found a critical gene responsible for human brain features, duplicated around two million years ago. The partial copy's interaction with the original gene likely enabled cognitive changes and neuron development benefits.
Researchers at McGill University turned back the clock to understand the evolution of sex differences in water striders. They found that male traits, such as elaborate antennae, were shaped by a struggle between sexes during mating, leading to increased mating success.
A recent study published in PLOS Biology reveals that touch sensitivity is hereditary and linked to genetic mechanisms that support hearing. The research found a strong correlation between touch and hearing acuity in healthy human populations, suggesting that a single mutation may impair both senses.
A new treatment for argininosuccinic aciduria (ASA) has been discovered through nitric oxide supplementation. The study found long-term heart and neuropsychological improvements in mice and humans afflicted with ASA, a genetic metabolic disorder that causes ammonia accumulation and liver and nervous system damage.
A new study identifies genes responsible for the Pygmies' relatively small size, suggesting hormonal pathways and immune system regulation as possible drivers. The research provides evidence of natural selection's role in shaping human traits, highlighting the importance of studying global diversity and evolutionary contexts.
Researchers have discovered that six unnatural nucleic acid polymers can share information with DNA, shedding light on the origins of life. The discovery opens up practical applications for molecular medicine, including new diagnostics and therapeutics.
A study in PLOS Computational Biology reconstructs the complete early evolutionary history of biological carbon-fixation. The researchers identified an early form of carbon fixation that achieved built-in robustness, allowing early life to compensate for internal chemistry issues.
Researchers from the University of Leicester discovered a new mechanism for cooperation in simple organisms, where individuals prefer those who resemble themselves. This 'similarity discrimination' effect can evolve quickly and powerfully in many social encounters, solving the long-standing puzzle of natural selection.
Scientists sequenced the Tasmanian tiger genome, revealing extremely low genetic variability due to geographical isolation. This limited genetic makeup makes the species highly susceptible to diseases and extinction.
A new study using surname data reveals China's population structure has been shaped by both genetic drift and large-scale migration. The research found the highest levels of surname diversity at the Yangtze River basin, which is believed to be due to multiple historical migrations.
A study by Uppsala University researchers found that humans have a unique genetic variant allowing for efficient production of Omega-3 and Omega-6 fatty acids from vegetable oils. This adaptation is linked to the development of modern human brain capacity but increases the risk of cardiovascular disease in today's life situation.
The study reveals that changes to both genes and DNA stretches controlling gene activity have driven sticklebacks' adaptation to fresh water. Reused genetic regions, including armor genes and those involved in metabolism and developmental signaling, helped remodel fish into forms better suited to freshwater environments.
A national team of scientists has created the first atlas of the human brain surface based on genetic information, revealing distinct genetic divisions that differ from traditional brain maps. This atlas provides a new tool for understanding how genes influence brain development and function.
Scientists at the University of Liverpool have developed a method to detect proteins associated with longevity, finding that certain proteins evolve in non-random ways in long-lived species. This suggests that these species have optimised pathways for repairing molecular damage, which could help develop anti-ageing interventions.
A study of Afghan DNA reveals a shared genetic heritage with a common ancestral population emerging during the Neolithic revolution. The analysis indicates that early civilizations in the region contributed to the unique genetic diversity of Afghans, shaped by migrations and invasions.
A genetic study has traced cattle back to a small herd of approximately 80 animals domesticated around 10,500 years ago. The research used DNA extracted from ancient cattle bones found in Iranian archaeological sites to determine the origins of domestication.
Researchers found that snakes from different parts of the world have evolved a limited set of genetic mutations to resist deadly neurotoxin TTX, which immobilizes nervous and muscle tissue. This study increases understanding of the genetic basis of adaptation and its limits.
A multinational team of researchers found that house mice (M. m. domesticus) colonized Iceland and Greenland during the Viking age, mirroring human settlement patterns. The analysis of mouse mitochondrial DNA showed no evidence of mice in Newfoundland, suggesting a fleeting presence.
Scientists have found highly similar signaling centers in the acorn worm that direct the formation of its embryonic body plan. This discovery provides unexpected insight into the evolution of vertebrate development and genetics, revealing complex mechanisms for establishing body plans in distant relatives.
A recent study led by Carlos J. Melian found that speeding up evolution through sexual reproduction may actually decrease species diversity. The researchers developed new models to connect the mode of reproduction to biodiversity and found that high genetic variation and evolutionary rates have little effect on general biodiversity.
The study compares the genomes of humans, chimpanzees, gorillas, and orang-utans, shedding light on human origins and genetic differences. Genetic changes important in evolution were found to be accelerated in genes related to sensory perception, hearing, and brain development.
Researchers found that bright light inhibits the firing of hydras' stinging cells, suggesting a daily rhythmic cue to regulate their behavior. The study links photoreception genes to the mechanism of hydra's harpoon-like cnidocytes, revealing unexpected functions beyond vision.
BGI's single-cell sequencing technology enables researchers to analyze genetic characteristics of essential thrombocythemia and clear cell renal cell carcinoma. The method provides clearer intratumoral genetic pictures and developmental history than previous bulk tissue sequencing, opening new ways for the genetic study of tumors.
A study published in PLOS Genetics reveals that chimpanzees living in close proximity are substantially more genetically different than humans from different continents. This finding highlights the importance of conserving each population independently to address habitat loss and hunting challenges.
Researchers propose that depression and related behaviors arose from genetic variations that helped ancestors fight infections, reducing mortality. This theory links depression to inflammation and physiological responses that were selected for reducing mortality from infection.
Researchers identify genetic differences between two closely related species of Nasonia wasps that yield distinct wing sizes. The discovery sheds light on the evolutionary origins of shape and size diversity in nature and has implications for understanding cell growth and diseases like cancer and diabetes.
A 28-year study found that wild cereal populations are undergoing dramatic changes due to climate change, including earliness in flowering time and reduced genetic diversity. These changes threaten the best genetic resource for crop improvement and may damage food production.
A new study found surprising diversity in a single neural connection in flies, challenging the idea that structure is key to understanding function. The research suggests that genetic drift or natural selection may have shaped these diverse connections, leading to rapid evolution.
A team of Whitehead Institute scientists confirms that the human Y chromosome has not lost a single ancestral gene in the past 25 million years. The study, published in Nature, contradicts the 'rotting Y' theory and suggests the Y chromosome has been genetically stable since its divergence from other chromosomes 25 million years ago.
Researchers have discovered two distinct groups of Sulfolobus islandicus bacteria speciating in a hot spring habitat, despite shared genetic material and gene exchange. The study reveals that these groups are already separate species, with differences spanning only 0.35% across the entire chromosome.
A new paradigm by Dr. Ehud Lamm redefines the genome as a dynamic system that can impact genes themselves, highlighting its physiological aspect. This perspective could provide deeper insight into how organisms develop and evolve.