A new review reveals a surprising number of exceptions to the purported rules of sex chromosome evolution, questioning their applicability across species. Global dosage compensation is found to be the exception rather than the rule, and studies show high rates of turnover and diversity in sex chromosomes.
A collaboration between Otago University and ESR has received a grant to sequence all of New Zealand's positive COVID-19 cases. The team will create a web browser application to track the virus's evolution, epidemiology, and transmission chains in NZ.
Researchers found chimpanzees produce lip-smacks at a speech-like rhythm of 4.15 Hz, confirming the existence of a continuous path in the evolution of primate mouth signals with this rhythm. This discovery supports the theory that spoken language evolved from existing primate communication systems.
A study found that SARS-CoV-2 RNA is edited by human deaminase enzymes in patients, influencing the virus' evolution and spread. This process may be targeted with new therapies to combat the virus.
A new simulation model describes various modes of cancer evolution in a unified manner, shedding light on therapeutic resistance and novel strategies. The study found that linear evolution occurs with strong driver mutations, while intratumor heterogeneity is shaped by natural selection or neutral evolution.
Researchers found that regulatory mutations in TBX5 and PITX1 genes cause foot feathering in both domesticated breeds of chickens and pigeons. This study demonstrates a remarkable convergence in the evolution of this trait across species, suggesting that favored mutations have been spread through strong phenotypic selection.
Researchers found that genetic variants at Tbx5 and Pitx1 contribute to foot feathering in both chickens and pigeons. A 17,000 base-pair long deletion near Pitx1 removes the same exact region in both species, indicating similar mutations and molecular pathways.
A new children's book introduces genetics to youngsters of primary school age through a rhyming narrative, explaining DNA and the role of nature and nurture in making each person unique. The book aims to engage young children with science, building on research that shows teaching genetics before evolution improves pupil understanding.
Scientists used chromosomes to study early events in vertebrate evolution, including the hybridization between two species of primitive fish. They found evidence of genome duplication and identified 17 ancient chromosomal units that were shared among jawed vertebrates.
A landmark 10-article collection clarifies oak evolution from deep roots to recent adaptations, identifying key genes involved in resistance to pathogens and genomic evidence for 56 million years of oak evolution. The study provides valuable insights into tree biology, particularly in response to rapid environmental change.
The evolution of pregnancy in seahorses and pipefishes is linked to modifications of the adaptive immune system. Genomic analysis reveals divergent genomic rearrangements in the MHC II pathway, which may help study immune deficiencies.
A recent study found that rates of climatic-niche evolution are similarly slow in both plants and animals, with only slight variations across different clades. This research highlights the importance of understanding climate change impacts on species distribution and evolution.
Researchers have proved one of Charles Darwin's evolution theories for the first time, showing that mammal subspecies are crucial to long-term evolutionary dynamics. The study, led by Laura van Holstein, found that subspecies play a pivotal role in shaping the future of species, particularly in response to habitat disruption.
Researchers at Karolinska Institutet have discovered a detailed blueprint for the development of the human cortex in the ancient lamprey brain, shifting its origin to over 500 million years ago.
A recent study by botanist Cody Coyotee Howard uncovered two ranges of optimum bulb diameter driven by natural selection, with larger bulbs thriving in warmer climates. The research has significant implications for understanding plant evolution, agriculture, and horticulture.
Researchers studied turtle ants using a species-level comparative analysis, finding that the evolution of head shape and size is reversible and decoupled within soldier and queen castes. This suggests that flexible adaptive evolution at the species level facilitates adaptive diversification of derived social lineages.
Studies have shown that turtle ant soldiers exhibit a four-fold difference in head shapes, adapted to different tunnel sizes. The research suggests that evolution can be dynamic and reversible, with some species evolving back into more generalist stages.
Scientists at Uppsala University propose the SNAP Hypothesis to explain why genes move on chromosomes. This hypothesis suggests that tandem duplications of chromosome sections occur frequently, leading to changes in gene order over time. Random loss of unnecessary duplicated genes can result in rapid rearrangements of remaining genes.
Scientists have found that gene loss played a crucial role in the evolution of animals, particularly in deuterostomes and ecdysozoans. The study revealed unprecedented levels of gene loss in these lineages, contradicting the assumption that evolution leads to increased complexity.
The discovery of Vellbergia bartholomaei, a tiny Middle Triassic lizard from Germany, provides new information about the early evolution of lepidosauromorphs. The species' unique characteristics suggest it may be a common ancestor of modern lizards and tuataras, revealing key findings in reptile evolution.
Ichthyosaurs experienced a rapid evolution burst around 250 million years ago but quickly lost their diversity due to overcrowded seas. The group's evolution slowed down significantly over the next 100 million years, leading to less variation between species.
A new study from Harvard University and the Field Museum of Natural History sheds light on how changes in spines happened in mammal evolution. Researchers found that regions evolved long before new spinal functions, suggesting a combination of developmental changes and adaptive pressures played a significant role.
A new study reveals that the rapid evolution of Darwin's finches and Hawaiian honeycreepers was linked to their beaks and skulls. The researchers found that these birds had a stronger association between their beaks and skulls than other bird lineages, allowing for more versatile evolution but constrained along specific directions.
A study reveals that pair living played a key role in the evolution of social systems in primates, serving as a stepping stone for group living. The research analyzed genetic data and behavioral observations of 362 primate species, finding that pair living was crucial for transitions among different forms of social complexity.
Researchers analyzed genes expressed in bat cochleae to understand the origin and evolution of high-frequency hearing. They identified 34 genes involved in hearing or auditory perception with evidence for positive selection in echolocating species.
Researchers found that Western sign languages have DNA traces from 5 European locations, including Austrian, British, French, Spanish, and Swedish. The study used genetic techniques to analyze data from dozens of sign languages, revealing a clearer picture of their evolution and historical development.
Researchers identified five main European sign language lineages that dispersed globally from the late 18th century, tracing their evolution through a comprehensive database of manual alphabets and handshapes. The study provides new insights into the origins and spread of sign languages, highlighting unexpected connections between Aust...
A new study has confirmed the history of tomatoes from South America, from blueberry-sized wild tomatoes to large-fruited common tomatoes. Scientists have reconstructed a putative domestication history of tomato groups, focusing on the intermediate stage represented by SLC, which originated in Ecuador around 78 KYA.
A study by Aarhus University and Nanjing University found that cultural evolution, not climate change, was the main driver of historical broad-scale biodiversity dynamics. The researchers identified the spread of agricultural land and Han culture as the cause of the extirpation of five megafauna species from much of China.
Researchers discovered a pattern of mechanisms improving retinal oxygen supply that evolved with enhanced vision in all bony vertebrates. The findings add to our understanding of the evolution of the eye, highlighting its dynamic morphology and relationship with retinal oxygen supply.
Researchers found transposable elements and gene expansions related to antioxidants in the rat lungworm parasite, suggesting adaptive evolution. The study also discovered convergent evolution of a key enzyme with flukes, which share similar host requirements.
Scientists discover ancient legged snake Najash, which shed light on the evolution of snakes' flexible skull. The study reveals that snakes possessed hind legs for 70 million years before losing them.
A study published in Nucleic Acids Research reveals that transposable elements have been co-opted by hosts to provide useful functions, such as encoding part of a host protein. The research found tens of thousands of potentially co-opted TE sequences, which are more conserved across species and suggest a key role in mammalian evolution.
A team of Harvard researchers has developed a new method to track rapid evolution in yeast, using DNA 're-barcoding' to follow specific genomes over approximately 1,000 generations. This approach could lead to more accurate predictions for the dominant influenza strains, enabling effective flu vaccine development.
Researchers found that Kentish plover (Charadrius alexandrinus) and white-faced plover (Charadrius dealbatus) diverged around half a million years ago due to sea level changes. The study revealed high genetic divergence on sex chromosomes, suggesting sexual selection played a role in species evolution.
A new study finds that hybridization significantly influences the evolutionary history of Heliconius butterflies, contributing to their unique wing patterns. The research suggests that hybridization can provide genetic material for rapid adaptive divergence and radiation, leading to beneficial consequences in species evolution.
New studies reveal a broader range of genetic code deviations than previously thought, particularly among green algae. The research suggests that these changes may have driven the evolution of unique mitochondrial genome organizations.
The study reveals that repeated genomic regions expanded during human evolution and associate with differential gene expression in human and chimpanzee brain cell types. Expanded tandem repeats may hold clues to mechanisms driving their expansion and potential roles in human development.
Researchers find over 100 insect larvae in amber, providing new evidence on the ecology of Eocene-era forests. The discovery supports a warm-to-temperate seasonal humid forest ecosystem interpretation, and offers insights into the evolution of dipteran larvae.
A team of scientists will investigate the evolution of Earth's chemical composition and physical processes over 4.4 billion years using melt inclusions in olivine and zircon crystals. The project aims to understand the recycling of chemical elements and its impact on plate tectonics.
Researchers discovered a 'senescence' pattern in influenza virus surface protein mutations, making it harder to predict future changes. This understanding can improve vaccine strain selection, ultimately enhancing protection against seasonal flu outbreaks.
Researchers found that ancient plant and animal communities differed significantly from today's, with a greater diversity of megaherbivores and non-ruminant species. The study suggests that environmental changes driven by grassland expansion and arid climate pulses may have influenced human evolution.
A new phylogenomic tree reveals the early evolution of stick insects was likely triggered by birds and mammals. The study suggests that their remarkable camouflage abilities evolved as an adaptation to avoid predators, with most old lineages emerging after the dinosaurs became extinct 66 million years ago.
Researchers found that genetic diversity makes a striking comeback in the host population after resistance evolution, thanks to an interplay between selection and population growth. The study's findings suggest that eco-evolutionary feedback plays a key role in shaping molecular evolution during species interactions.
Researchers extracted genetic info from a 1.77 million-year-old rhino tooth, revealing an almost complete set of proteins and expanding the possibilities of retrieving reliable genetic information from mammal fossils. This breakthrough could solve long-standing mysteries of ancient animal and human biology.
Researchers have extracted almost complete sets of proteins from ancient dental enamel, allowing scientists to reconstruct molecular evolution beyond the usual DNA preservation limit. This breakthrough enables scientists to study hundreds of species, including humans, and could revolutionize our understanding of the world's evolution.
Researchers found that sea lampreys' bile acids produce as sex pheromones are less varied among mature males than larvae, suggesting sexual selection plays a role in their evolution. Further research is needed to fully understand the relationship between pheromone diversity and mate preferences.
A pioneer study published in PNAS reveals that bacterial sex plays a pivotal role in the evolution of the mammalian microbiome. Horizontal gene transfer, facilitated by temperate bacteriophages, is the primary mechanism driving bacterial evolution in a healthy gut.
A study published in Evolution Letters reveals that many carnivorous species share a common ancestor dating back 800 million years, while herbivory is more recent. The research suggests that animals tend to adopt the same dietary category as their closely related species, implying that switching diets may not be easy.
A WPI biologist has discovered that a key component in a worm's communication system can be repurposed to take on a different function, providing insights into the workings of evolution. This finding could have significant implications for drug interaction research, agricultural bio-engineering, and our understanding of genetic inherit...
Researchers found a link between microRNA regulation and the rapid evolution of new species in Nicaraguan crater lakes. They analyzed five species of Midas cichlids and identified specific pairs of microRNAs and genes that interact with each other.
A recent study in Nature Ecology and Evolution found that gene arrangements in the genome have played a key role in animal evolution. The researchers discovered that genes present together in several species are also active in the same cells, highlighting a new perspective on investigating cell type identities.
Researchers at the University of Bristol discovered the secrets of shoot evolution, revealing a switch that enabled plants to delay reproduction and grow shoots, leaves, and buds around 450 million years ago. This finding has significant implications for understanding plant shape regulation and could inform efforts to engineer crops.
A recent study has found that intense fish harvesting can cause rapid evolutionary changes, including changes in growth rates and maturity. The research, published in Science, used genomic data to analyze the effects of fishing on Atlantic silverside populations.
A team of researchers found that tiny gas-filled bubbles in volcanic rocks can facilitate physicochemical interactions, potentially accelerating prebiotic chemical evolution. The study suggests that temperature differences at these interfaces could have initiated the emergence of living systems on early Earth.
Climate change and elevated CO2 levels contribute to the evolution of weeds, including increased competitive abilities and herbicide resistance. Research found that drought and elevated CO2 cause genetic and phenotypic changes in individual weed populations.
A recent study published in Current Biology has challenged the long-held idea that Hox genes are the primary drivers of body plan evolution. Researchers found that modifications to a Hox gene were only part of the story, with other genes playing crucial roles in shaping animal development.
Researchers developed a mathematical model to understand intergroup conflicts, finding that acculturation can promote the evolution of conflict. The study suggests that groups may fight for fighting's sake, despite costs, and that cultural evolution can spread conflict.
Researchers developed a new technique called VEGAS, which enables rapid development of scientific tools and new treatments for diseases in mammalian cells. The method can yield useful new molecules within days, providing scientists with a powerful research tool.
A genome study has revealed the evolution of ruminants, including deer, antelope, and giraffes. The research provides a foundational genomic roadmap for understanding how evolution has shaped these animals, as well as their unique digestive system and adaptations to environmental changes.