Articles tagged with Genetic Drift
A recent study found that wild snapdragons use subtle shades to attract bees, with four paintbrush genes working together to create a gradient of yellow. The strength of natural selection on each gene was estimated using a hybrid zone where two varieties meet, revealing the intricate mechanisms behind molecular gradients.
A new study reveals how beluga whales in Alaska's Bristol Bay survive through a surprising strategy: they mate with multiple partners over several years. This polygynandrous system helps maintain genetic diversity despite the population's small size and isolation.
Researchers analyzed seeds from a now-extinct plant population on Nishinoshima, tracing its lineage to nearby Chichijima island. The study found distinct genetic traits and a strong founder's effect due to limited seed dispersal opportunities.
A new study suggests that genetic rescue of endangered species may not be as effective as previously thought, and could even introduce more harmful mutations. Analysis of Eastern massasauga rattlesnakes found more deleterious than adaptive mutations in donor animals selected for relocation.
Despite using a large genetic dataset, scientists were unable to find a definitive explanation for the formation of distinct great white shark populations in the southern Indo-Pacific Ocean. A study published in Proceedings of the National Academy of Sciences suggests that genetic divergence began around 7,000 years ago.
A new study analyzing ancient genomes from seven individuals in present-day Honduras provides insights into the genetic origins of the Classic Maya people and their population expansion or decline during the rise and fall of their civilization. The research contributes to our understanding of human history, population dynamics, and env...
Researchers from the University of Gothenburg have discovered that Pacific oysters can reproduce in less salty waters, potentially allowing them to colonize the western Baltic Sea. The study found that genetic diversity and breeding habitat play a crucial role in the oysters' ability to adapt.
The American Heart Association warns hunters about the increased risk of heart attack and stroke due to exertion, cold temperatures, and excitement. Hunters should recognize symptoms, take breaks, and have a plan in case of emergencies. Learning Hands-Only-CPR can also save lives.
A recent study found that Viking colonizers of the Faroe Islands and Iceland came from different Scandinavian populations. The researchers analyzed genetic samples from 139 men and compared them to samples from Norway, Sweden, Denmark, Iceland, and Ireland, revealing a 'founder effect' that persists in today's male populations.
Researchers at the University of Bath found that shorebird species with polyandrous mating systems exhibit faster evolution rates than monogamous species. Genetic changes in the sex chromosomes revealed that Z chromosome mutations are more influential due to genetic drift.
A team of researchers decoded the origins and spread of the bottle gourd, a staple in ancient civilizations for over 10,000 years. The study mapped the genetic blueprint of 197 varieties, revealing its domestication in Southern Africa around 12,000 years ago.
Studies tracking influenza A(H3N2) evolutionary dynamics over 22 seasons show genetic distance and subtype interference as key factors in determining epidemic timing and severity. The study highlights antigenic drift of HA and NA antigens, with increased NA drift linked to greater epidemic intensity and dominance of the A(H3N2) subtype.
Research on Betula ermanii saplings reveals two distinct mechanisms contributing to poor growth: adaptation to extreme environments and genetic drift leading to inbreeding. Populations at the edge of their distribution range are susceptible to these effects, highlighting the need for conservation measures
Researchers mapped mosquito's tree of life, revealing how the insects chose their hosts and evolved disease transmission. The findings suggest mosquitoes started out feeding on amphibians and later moved to other groups as they flourished.
Researchers have discovered that midbody remnants, thought to be cellular trash, contain working genetic material that can change the fate of other cells, including turning them into cancer. The study suggests that these remnants may play a key role in spreading cancer throughout the body.
Researchers from a Portuguese-Angolan TwinLab conducted fieldwork in the Angolan Namib desert, discovering groups thought to be extinct or uncontactable. The study reveals unique Pre-Bantu ancestry in modern populations from the Namib desert, divergent from other southern African ancestries.
Researchers studied genetic differences between two Chornobyl dog populations living near the nuclear power plant and 16.5 km away. They found significant genetic distinctions, with 391 outlier regions indicating potential genetic repair mechanisms. The study may provide insights into human adaptability to environmental disasters.
The University of Guam is conducting a four-person research team's study on the genetics of corals from the Northern Mariana Islands to understand coral population connections, diversity, and adaptations. The study aims to identify potential reserves for declining reefs and assess the impact of warming waters.
A new study examines mathematical models designed to draw inferences about how evolution operates at the level of populations of organisms. The researchers conclude that such models must be constructed with care, avoiding unwarranted initial assumptions and weighing existing knowledge.
A recent study on the Maniq population found they exhibit high levels of genetic differentiation, similar to other isolated populations. The researchers also discovered that the Maniq retain a unique hunter-gatherer lifestyle and Hòabìnhian-related ancestry, setting them apart from other Southeast Asian groups.
Human activity on Hainan Island is causing changes in the body shapes and diets of tropical birds, resulting in biotic homogenisation. Despite efforts to protect biodiversity, the island's unique ecosystem is being affected by large-scale economic and land-use changes.
A novel theory explains how species adapt across their ranges, identifying a critical threshold that determines the success of expansion. The theory shows that dispersal can be beneficial for adaptation but also carries costs, such as reducing genetic diversity.