Articles tagged with Evolutionary Genetics
A team of scientists discovered that genetic diversity in host populations slows down the adaptation of parasites, increasing their resistance to disease. This finding has significant implications for ecosystem research and the preservation of biological diversity.
Researchers found that mechanical cues contribute to the regulation of gene expression during early development. External pressure can activate or restore the expression of a crucial developmental regulator gene, brachyury. This mechanism is conserved across species, including zebrafish and fruitflies.
A study found that genes beneficial in youth but detrimental in old age may contribute to the rise of chronic diseases in modern societies. The review suggests that natural selection may be changing course, but more research is needed to fully understand its impact on human health.
Researchers discovered a genetic signature in Nasonia wasps that suppresses Wolbachia bacteria transmission to eggs, giving the wasp an evolutionary benefit. This finding provides insight into how animals may evolve to control their transmitted bacteria, highlighting unique defense strategies across species.
Researchers aim to identify genetic markers that can predict tumor response to radiation therapy, leading to more personalized treatment approaches. The goal is to improve treatment responses, reduce toxicity, and enhance quality of life for cancer survivors.
A comprehensive genomic database for fishes has resolved evolutionary relationships among 131 species, including tuna and seahorses, and identified genetic markers to track divergence through time.
Researchers at Michigan State University have identified how MRSA absorbs human fatty acids to resist antimicrobials, providing a new target for developing more effective treatments. By inhibiting the cell membrane's ability to produce lipids, scientists may improve the efficacy of existing antibacterial agents like triclosan.
In a breakthrough study, microbes have been found to act like savvy investors when contributing to the common good. They adjust their investment strategy depending on how much they have at stake, maximizing returns in groups with mostly relatives and exploiting contributions in outnumbered groups.
Researchers discovered a genetic variant associated with migraine headaches that is more common in people living in colder climates and higher latitudes. This variant may have helped early humans adapt to the cold, contributing to its high frequency in European populations and higher prevalence among individuals suffering from migraines.
Forest elephant populations across Central Africa exhibit genetic similarity, highlighting the importance of conserving this critically endangered species. Conservation efforts can save many species by protecting one, as forest elephants play a vital role in maintaining plant diversity and ecosystem balance.
Researchers aim to determine when the pause in transcription first appeared in evolution by studying various organisms and plant life. They hope this investigation will help narrow down the origin of the pause, shedding light on how complicated life arose on Earth.
Researchers at Oxford University have identified a genetic catalyst, ampR, that accelerates the evolution of antibiotic resistance in bacteria. The study found that species carrying the ampR gene evolve resistance at a higher rate than those lacking it.
A genetic mutation that increased mammary duct branching may have provided more vitamin D to infants, helping them survive in the far north. Shovel-shaped incisors became more frequent among Native Americans due to the same genetic factor, highlighting the importance of the mother-infant bond.
Researchers found a gene, MEI-218, that controls the rate of recombination in two species of fruit flies. The discovery sheds light on how crossover rates have evolved to balance benefits and risks, with implications for understanding genetic diversity and evolutionary adaptation.
Researchers found that Great Barrier Reef corals have enough genetic variation to adapt to rising ocean temperatures, allowing them to potentially survive for at least another century. This offers a glimmer of hope for conservation efforts, but also highlights the need to take action against global warming.
A UCLA-led team of biologists reports that a six-mile-wide asteroid crash 66 million years ago created an enormous evolutionary void for marine fish to diversify. Today's rich biodiversity among marine fish shows the fingerprints of this mass extinction, with six major acanthomorph groups producing almost all marine fish diversity.
A team of scientists discovered 124 genes involved in determining human hair color variation, explaining a substantial fraction of hair color variation and heritability. The new findings have implications for conditions linked to pigmentation, such as skin, testicular, prostate, and ovarian cancers.
Researchers at Peter the Great St. Petersburg Polytechnic University developed a computational method predicting harmful mutations in mammalian species. This approach enables classification of damaging mutations in other mammals, facilitating optimized animal breeding programs.
Researchers found parallel genetic changes in closely related species, making them vulnerable to viral jumps. This raises concerns about emerging infectious diseases like HIV and SARS coronavirus.
A new method prioritizes species for conservation efforts in the face of uncertainty. The approach overcomes data limitations to identify phylogenetic conservation priorities, producing accurate estimates of evolutionary distinctness scores.
A recent study found that gene regulation by protein transcription factors is the most likely mechanism for generating evolutionary change. This discovery challenges previous assumptions and sheds light on the process of evolutionary adaptation.
Researchers created a genetically engineered ferret with a mutation linked to abnormally small human brain size, revealing an evolutionary mechanism governing cerebral cortical size. The study suggests that genes responsible for centriole function played a crucial role in the expansion of human brains over time.
The study found that rorquals have been hybridizing during their evolutionary history, with genetic barriers between species seemingly non-existent. This rare phenomenon, called sympatric speciation, has significant implications for our understanding of biodiversity.
Researchers discovered a new path of evolution that enables viruses to quickly adapt to their environment and infect new host targets. This phenomenon could lead to new insights into preventing the emergence of new diseases.
Researchers Emily Setton and Prashant Sharma discovered that spiders and scorpions co-opted leg genes to build their heads. This genetic adaptation allows scientists to trace the evolutionary history of these animals, revealing a complex web of genetic mechanisms underlying their diversity.
Researchers studying cavefish found that they can live healthy lives with high blood sugar levels, contrary to what is seen in humans. The fish have insulin resistance but no apparent harm from chronically elevated glucose levels.
Researchers uncover evolutionary origin of vertebrate limbs by analyzing genetic elements first used to develop dorsal fins in ancient fish. The findings suggest that these elements were later redeployed to produce paired appendages, like arms and legs.
A study by Hokkaido University researchers predicts insect community structure by analyzing genomic variation in a tree species. The findings show that genetic distance between alders is the most important predictor of arthropod communities, providing clues for effective ecosystem preservation plans.
A new study has identified the earliest stages of evolution where distinct sperm and egg cell types first emerged from a simpler ancestral mating system. The research found that the sex-determining region associated with male-female differentiation in algae is surprisingly small, consisting of only one gene called MID.
A new study using ancient and modern genome-wide data found that Papuan ancestry replaced early Austronesian-Lapita population in Vanuatu, yet the original Austronesian languages persisted. This provides a unique case of demographic history where genetic ancestry but not language was replaced.
A new study by Ohio State University researchers found that psychedelic mushrooms developed psilocybin to interfere with insect neurotransmitters, lowering the chances of being eaten. This evolutionary explanation could guide medical science in finding novel treatments for neurological disorders.
A new ultra-deep DNA sequencing approach uncovers competing mechanisms of evolution as a threat to efficient large-scale fermentation. Evolution constrains bioproduction, leading to yield decrease and productivity issues.
Researchers used historic and modern plant genomes to measure the rate of evolution in a wild plant. They found that Arabidopsis had been introduced to North America by Europeans around 1600, with new mutations appearing over the past 400 years. These findings provide insights into the genetic paradox of invasion.
A recent study of ancient DNA has found that the Bell Beaker culture in Europe comprised two genetically distinct populations, challenging previous assumptions about their spread. The research also revealed a significant genetic shift, introducing variants for paler skin and lighter-colored eyes, as well as genes for digesting lactose.
A genomic study reveals that the Beaker culture spread throughout Europe through cultural diffusion, replacing around 90% of populations in areas like Great Britain. The study shows no evidence of large-scale genetic migration from Iberia to Central and Western Europe.
Researchers found the hybrid zone had moved north nearly 40 kilometers due to warming, impacting genetic composition and potential for gene flow. Climate change may lead to a loss of genetic variation, threatening population sizes of individual species.
New research reveals that plants originated 100 million years earlier than previously believed, with ancient plant fossils now estimated to be around 320 million years old. This discovery challenges existing models of atmospheric change and highlights the critical role of early plant life in shaping Earth's climate.
A comprehensive map of butterfly evolution has been created using a 35-fold increase in genetic data, revealing key relationships between species and classification units. The study confirms swallowtails are a sister group to all other butterflies, while blues are nested within hairstreaks.
A new themed issue of the Royal Society journal explores human evolution through an interdisciplinary lens, combining biological, anthropological and cultural perspectives. Researchers found that English speakers' regional dialects influenced Sranan creole's development, shedding light on events in human history with few other traces.
Red-fronted lemurs demonstrate ability to differentiate between conspecifics and closely related sister species based on facial pattern and color variations. The study found that females showed a stronger reaction than males, indicating visual and olfactory signals play crucial role in species recognition.
The Amazon molly's unique reproductive method has allowed it to thrive for millennia, defying expectations that asexual reproduction would lead to extinction. The fish's hybrid genome and high genetic diversity have enabled it to adapt to environmental changes without accumulating harmful mutations.
Researchers have discovered that Bayesian model selection tends to produce very high posterior probabilities for estimated evolutionary trees even if they are clearly wrong. This phenomenon is attributed to the non-nested nature of some models, which can lead to polarized behavior.
A new study reveals that up to 16% of Earth's species could qualify as potential alien species, posing significant challenges to biosecurity efforts. The research found that the number of newly emerging alien species continues to rise, with insects and molluscs being the groups most affected.
A Wits University PhD student has solved part of the evolutionary puzzle of multicellularity by studying the genomic sequence of a four-celled algae. The research identified the ubiquitin proteasomal pathway as a process controlling cell division, which played a key role in the evolution of multicellularity.
A genetic study found that house dust mites replaced the traditional Piwi pathway with a new small RNA mechanism to control transposable elements, affecting up to 1.2 billion people worldwide. The discovery provides insights into the evolutionary history of these common indoor pests.
Researchers found a transient, shape-shifting mechanism in DNA that influences the frequency of spontaneous mutations, which can drive evolution and diseases like cancer. The study reveals that specific DNA sequences affect the rates of these errors.
A new study published in Molecular Biology and Evolution has found that recombination between the X and Y chromosomes takes place in sex-reversed XY females, helping to maintain the Y chromosome. This discovery challenges conventional views of sex-chromosome evolution and provides strong support for the 'fountain of youth' hypothesis.
New research suggests that language is learned in brain systems also used for tasks like remembering shopping lists and driving. Children learn their native language in evolutionarily ancient brain circuits, while adults learn foreign languages in both declarative and procedural memory.
Researchers found a genetic mutation that alters limb shape by changing the regulation of a specific gene. This discovery provides evidence for how interchromosomal translocations can lead to morphological alterations.
Direct DNA sequencing is uncovering unexpected genetic connections between ancient and modern populations in Eurasia, suggesting early gene flow or population structure that led to Europeans and Asians. Genetic analyses also reveal Neanderthal ancestry and mixing events, providing new insights into human prehistory.
Scientists have shown that alternation of wet and dry conditions can drive the prebiotic synthesis of RNA nucleosides. The new experiments demonstrate a plausible route for the formation of these building blocks, which constitute the informational components of RNA.
The 2018 AAAS/Subaru SB&F Prize for Excellence in Science Books recognizes outstanding science books for young readers, including 'Beauty and the Beak' and 'Animals by the Numbers'. The winners showcase engaging science writing and illustration, highlighting diverse topics such as animal statistics and waste management.
Researchers at UC are studying the genetic development of spider eyes to find opportunities for research into human visual challenges. They found that spiders evolved from simple compound eyes to complex eyes over a short period of 50 million years, and that they use similar genetic pathways to build their eyes as insects do.
UK schoolchildren's evolution acceptance is linked to their scientific aptitude, not psychological conflicts with belief systems. The study found that lower-aptitude students struggled to understand science concepts and responded poorly to teaching on both evolution and genetics.
A UCR study reveals how intensive pesticide use is driving mosquito evolution at the genetic level, boosting resistance to insecticides. The findings highlight the need for new strategies to overcome pesticide-resistant mosquitoes and control malaria.
Recent research suggests up to 5% of modern humans' DNA originated from Neanderthal populations, sparking questions about species' genetic makeup. Dr. Anthony J. Tosi's new NSF-funded project aims to investigate the evolutionary mechanics of hybridization across a primate radiation.
Scientists at the University of Oregon have isolated blood-feeding and non-biting genes in mosquitoes, a breakthrough that could lead to female mosquitoes that no longer bite and spread diseases. The goal is to identify universal non-biting genes across multiple disease vectors.
A genetic analysis of 33 Candida glabrata strains found that they can reproduce sexually, exchanging genes that may lead to drug resistance. This discovery sheds light on the evolution of candidiasis and highlights the need for a more diverse approach in studying this pathogen.
A genetic mutation that occurred 700 million years ago may have facilitated the connection of gene networks involved in animal embryogenesis, leading to the formation of complex organs. This discovery highlights the importance of serendipity in evolution and the versatility of biological tools.
Seemingly identical sea snake populations revealed to be genetically distinct, emphasizing the importance of preserving biodiversity. Targeted research on habitat and diet requirements is crucial to understanding the sudden disappearance of sea snakes from Australian reefs.