Articles tagged with Evolutionary Genetics
Researchers found that periwinkles have developed a genetic toolkit with specific genes clustered on three chromosomes to help them adapt to environments threatened by crabs and waves. This rapid adaptation is thought to have occurred within 5,000 generations, enabling the snails to survive in rapidly changing coastal habitats.
The study of Flores pygmy humans shows they have Neanderthal and Denisovan ancestry, but no direct link to Homo floresiensis. The short-statured phenotype is a result of recent polygenic selection on standing genetic variation.
Researchers found that modern pygmy genomes showed no evidence of gene flow from the extinct 'hobbit' species, contradicting previous expectations. However, they did find genetic variants associated with short stature and dietary adaptations in genes involved in fatty acid metabolism.
Rice University's Luay Nakhleh has received $1.5 million in grants from the NSF to develop algorithms that can infer evolutionary histories of tumor cells, helping researchers understand why some cancer cells spread and mutate differently.
Researchers identified 27 unique amino acid replacements in 27 different proteins of hot-spring snakes, which were associated with functions like immunity and DNA repair. These mutations enable the snakes to thrive under extreme conditions such as intense radiation and hypoxia.
A team of researchers has discovered a new species of Placozoa, a phylum of simple multicellular animals, by analyzing its genetic makeup. The study, published in PLOS Biology, used taxogenomics to describe the new species, which was previously thought to be a single species, Trichoplax adhaerens.
A new species of round fungus beetle was discovered in Malaysian Borneo with remarkably long genitalia. The species was named after actress and biologist Isabella Rossellini due to its unique reproductive characteristics, showcasing an evolutionary 'sexual arms race' between males and females.
Researchers found that different types of efflux pump proteins, key to antibiotic resistance, may not have evolved from a common ancestor. Instead, they may have developed independently through convergent evolution, offering new insights into fighting drug-resistant superbugs.
Researchers at Ohio State University found that unisexual salamanders rarely borrow DNA from other species, despite persisting for millions of years. The study suggests that their unique reproductive strategy may be linked to environmental changes or specific interactions with other species.
A study found that bats have preserved a viral gene from an ancient Ebola-like virus for millions of years. The VP35 gene helps regulate the immune system and may play a role in preventing disease in bats.
A study found that variations of a single gene in pigeons are associated with diverse feather patterns and unexpected links to human vision defects. The gene, Norrie Disease Protein, is well-studied in humans but has different effects on pigs, causing only pigmentation changes.
A new AI framework, ExPecto, predicts the effects of genetic mutations in the 'dark matter' regions of the human genome. The framework pinpointed mutations potentially responsible for increasing the risk of several immune-related diseases, including chronic hepatitis B virus infection and Crohn's disease.
Scientists discovered that polyps of the marine hydrozoan Ectopleura larynx allow genetically unrelated individuals to fuse their bodies and share skin and stomachs. This unique behavior provides survival advantages in a competitive ocean environment.
Human ancestors were scattered across Africa, with diverse habitats and shifting environmental boundaries leading to a staggering diversity of human forms. The mixing of these populations ultimately shaped our species.
Researchers decipher how plants evolve recognition systems to prevent self-fertilization, leading to genetic diversity in nature. The study found that new mating types can evolve through different pathways and are influenced by population demographics and mutation rates.
Researchers used genetic analysis to sort bat species, revealing two new species in Kenya. The findings have implications for conservation and farming efforts.
Researchers found that evolutionary changes occur deep in the fly brain, in a small cluster of neurons controlling mating behavior. The study overturned long-held beliefs about how evolution ensures animals perpetuate their species.
UCSF researchers identified key genetic changes that transform benign moles into malignant melanoma, including mutations in DNA regulatory genes. They used CRISPR to recreate the steps of melanoma evolution in lab cells, revealing new biomarkers and potential targeted therapies.
A study published in BMC Evolutionary Biology found that Bale monkeys living in different habitats have distinct mitochondrial DNA profiles. The researchers discovered that populations from fragmented forests were more closely related to vervet and grivet monkeys than those from continuous forests, suggesting hybridization had occurred.
A recent study reveals that the fastest rates of species formation occur at high latitudes and in cold ocean waters, contradicting the long-held assumption that tropical environments are evolutionary hot spots. The research found that cool-water and polar ocean fishes formed new species twice as fast as average tropical fish.
The study analyzed 71 placental mammalian species and found that the genes RXFP2 and INSL3 were either lost or nonfunctional in four Afrotherian species, indicating a more recent origin of testicular retention. This suggests that molecular vestiges can be used to reconstruct evolutionary changes in body parts.
A study of nearly 4,000 extremely old Italians found that mortality rates plateau after 105 years old, with people between 105-109 having a 50/50 chance of dying within the year and an expected further life span of 1.5 years. The findings challenge previous research on a final cut-off point for human lifespan.
The study uses DNA sequence data to analyze the evolution of testes in mammals, finding that African species lack the testicular descent process due to non-functional genes. This suggests that the testicular descent process was ancestral and lost in these species.
A recent study has identified 246 candidate genes involved in dog domestication, which influence brain function, development, and behavior. The research suggests that changes in these genes may have contributed to the evolution of dogs from wolves, making them more active during the day rather than at night.
A fossil of a banana-eating bird ancestor was found in North America, dating back 52 million years. The discovery suggests these birds once thrived outside the tropics, with long legs indicating they may have been ground-dwelling.
Researchers developed a new genetic engineering technique to improve an enzyme's ability to break down biomass. The EASy method enables accelerated evolution of desirable traits in microorganisms, leading to more efficient conversion of lignin into fuels and plastics.
Researchers found that expanding gene-regulatory modules can give rise to new traits, such as the enlarged snout in African cichlid fishes. The study implicated key genetic pathways, including the Tgfβ-Scx pathway and Adam12 protein.
A new study reveals that RNA changes played a crucial role in the domestication of sunflowers, allowing for rapid evolutionary transformation over 5,000 years. The researchers identified key genes and regulatory mechanisms involved in alternative splicing, which created useful efficiencies but also introduced variation.
A new study led by the NIH identified roles for over two dozen genes shared with humans, many linked to human eye disorders, in causing cavefish blindness. Epigenetic regulation mechanisms have been found to play a key role in this process.
A study analyzing ancient Icelandic genomes of 25 individuals from the island's colonization period (870-930) found that present-day Icelanders have a 70% Norwegian genetic fingerprint. The analysis also revealed a gender bias in the population, with men of Scandinavian origin having more offspring than women of Celtic origin.
A team of researchers has developed a model that simulates protein evolution, revealing how evolving protein components can give rise to dynamic and efficient molecular machines. The model shows that flexibility allows proteins to bind effectively to other molecules.
Cavefish have higher levels of DNA methyltransferase DNMT3B in developing eyes, leading to epigenetic suppression of eye development genes. This process differs from genetic mutations, which are permanent changes in the DNA code.
A genetic algorithm developed by Spanish researchers accurately predicted the vertical growth of Tokyo's Minato Ward, predicting the number and locations of future skyscrapers. The study suggests that evolutionary computation can identify hidden patterns in urban systems and predict possible city evolution scenarios.
Mongooses learn lifelong habits from escort animals rather than their genetic parents, according to University of Exeter researchers. This cultural inheritance helps maintain diversity within groups, contradicting expectations that it would lead to uniformity.
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.
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.
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.
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.