Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

What is Natural Selection?01:32

What is Natural Selection?

Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
Limits to Natural Selection01:38

Limits to Natural Selection

Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
Expected Value01:15

Expected Value

The expected value is known as the "long-term" average or mean. This means that over the long term of experimenting over and over, you would expect this average. The expected average is represented by the symbol μ. It is calculated as follows:In the equation, x is an event, and P(x) is the probability of the event occurring.The expected value has practical applications in decision theory.This text is adapted from Openstax, Introductory Statistics, Section 4.2 Mean or Expected Value and...
Bias01:22

Bias

Bias refers to any tendency that prevents a question from being considered unprejudiced. In research, bias occurs when one outcome or answer is selected or encouraged over others in sampling or testing. Bias can occur during any research phase, including study design, data collection, analysis, and publication.
In statistics, a sampling bias is created when a sample is collected from a population, and some members of the population are not as likely to be chosen as others (remember, each member...
Evolutionary Psychology01:20

Evolutionary Psychology

Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the human psyche...
Equity Theory01:26

Equity Theory

Equity theory explains how our sense of fairness influences the dynamics of close relationships. Rooted in social psychology, the theory posits that individuals evaluate fairness by comparing the ratio of their contributions to the rewards they receive. Relationship satisfaction is highest when these ratios are perceived as balanced between partners, promoting mutual reciprocity and a sense of justice.Equity vs. Equality in RelationshipsEquity is distinct from equality. Fairness does not...

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

A conceptual framework to dissect emergent functions in microbial communities.

Current opinion in microbiology·2026
Same author

Diverse Microbial Communities Assemble on Both Recalcitrant and Labile Carbon Sources.

Environmental microbiology·2026
Same author

Autogenic transitions in individuality.

Comptes rendus biologies·2026
Same author

Scientists' Warning to Humanity: Unnecessary Bureaucracy Is a Global Impediment to Productivity, Advancement of Human and Planetary Wellbeing, Science and Sustainability.

Microbial biotechnology·2026
Same author

Eco-evolutionary dynamics of massive, parallel bacteriophage outbreaks in compost communities.

Science advances·2026
Same author

Compensatory evolution facilitates loss of prfB autoregulation in Pseudomonas fluorescens SBW25.

Molecular biology and evolution·2026

Video Experimental Relacionado

Updated: May 8, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 5, 2017

9.0K

Evolución experimental de la cobertura de apuestas.

Hubertus J E Beaumont1, Jenna Gallie, Christian Kost

  • 1New Zealand Institute for Advanced Study and Allan Wilson Centre for Molecular Ecology & Evolution, Massey University, Private Bag 102904, North Shore Mail Centre, North Shore City 0745, Auckland, New Zealand. h.j.e.beaumont@biology.leidenuniv.nl

Nature
|November 6, 2009
PubMed
Resumen

La cobertura de apuestas, una estrategia de propagación de riesgos, evolucionó de novo en bacterias experimentales que se adaptan a entornos fluctuantes. Este estudio proporciona evidencia directa del origen adaptativo de la cobertura de apuestas, un mecanismo evolutivo clave.

Más Videos Relacionados

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 23, 2018

9.1K
Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix
09:13

Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix

Published on: July 11, 2020

3.5K

Videos de Experimentos Relacionados

Last Updated: May 8, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 5, 2017

9.0K
Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 23, 2018

9.1K
Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix
09:13

Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix

Published on: July 11, 2020

3.5K

Área de la Ciencia:

  • Biología evolutiva Biología evolutiva.
  • Genética microbiana Genética microbiana.
  • La adaptación y la evolución.

Sus antecedentes:

  • La cobertura de apuestas, caracterizada por la conmutación estocástica entre estados fenotípicos, es una adaptación evolutiva crucial para la supervivencia en entornos fluctuantes.
  • Si bien se ha observado en diversos organismos, la evidencia experimental directa de la evolución adaptativa de la cobertura de apuestas ha sido escasa.

Objetivo del estudio:

  • Para investigar la evolución de novo de la cobertura de apuestas en poblaciones bacterianas experimentales.
  • Proporcionar evidencia directa del origen adaptativo de la cobertura de apuestas como una estrategia evolutiva.

Principales métodos:

  • Evolución experimental de poblaciones bacterianas sometidas a un entorno en constante cambio que favorece nuevos fenotipos.
  • La re-secuenciación del genoma de las cepas bacterianas de cobertura de apuestas evolucionadas para identificar mutaciones genéticas.
  • Análisis funcional para determinar la necesidad y la suficiencia de mutaciones específicas para el comportamiento de cobertura de apuestas.

Principales resultados:

  • La cobertura de apuestas evolucionó en dos de las doce réplicas bacterianas experimentales, interrumpiendo la tendencia de la evolución sucesiva de nuevos fenotipos.
  • Los genotipos evolucionados de cobertura de apuestas exhibieron una rápida conmutación estocástica de fenotipos, mejorando la persistencia en el entorno fluctuante.
  • El análisis del genoma reveló nueve mutaciones en una cepa de cobertura de apuestas, siendo una mutación final necesaria y suficiente para el cambio, dependiendo de mutaciones anteriores.

Conclusiones:

  • Este estudio proporciona la primera evidencia directa de la evolución adaptativa de la cobertura de apuestas en un organismo simple.
  • Los hallazgos sugieren que la cobertura de apuestas, una estrategia de propagación de riesgos, puede representar una antigua solución evolutiva a la inestabilidad ambiental.
  • Comprender la base genética de la cobertura de apuestas ofrece información sobre la evolución de la adaptación y la persistencia microbiana.