Search research articles

ACERCA DE JoVE

Visión General Liderazgo Blog Centro de Ayuda JoVE

AUTORES

Proceso de Publicación Consejo Editorial Alcance y Políticas Revisión por Pares Preguntas Frecuentes Enviar

BIBLIOTECARIOS

Testimonios Suscripciones Acceso Recursos Consejo Asesor de Bibliotecas Preguntas Frecuentes

INVESTIGACIÓN

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archivo

EDUCACIÓN

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Centro de Recursos para Profesores Sitio de Profesores

Términos y Condiciones de Uso

Política de Privacidad

Videos de Conceptos Relacionados

Evolution of New Traits in Microbes

Evolution of New Traits in Microbes

Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...

Limits to Natural Selection

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.

Gene Evolution - Fast or Slow?

Gene Evolution - Fast or Slow?

The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...

Gene Evolution - Fast or Slow?

Gene Evolution - Fast or Slow?

Hardy-Weinberg Principle

Hardy-Weinberg Principle

Diploid organisms have two alleles of each gene, one from each parent, in their somatic cells. Therefore, each individual contributes two alleles to the gene pool of the population. The gene pool of a population is the sum of every allele of all genes within that population and has some degree of variation. Genetic variation is typically expressed as a relative frequency, which is the percentage of the total population that has a given allele, genotype or phenotype.

The Evidence for Evolution

The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.

También podría leer

Artículos Relacionados

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

Ordenar por

Same author

Methanonatronarchaeum thermophilum gen. nov., sp. nov. and 'Candidatus Methanohalarchaeum thermophilum', extremely halo(natrono)philic methyl-reducing methanogens from hypersaline lakes comprising a new euryarchaeal class Methanonatronarchaeia classis nov.

International journal of systematic and evolutionary microbiology·2018

Same author

Bioinformatics Meets Virology: The European Virus Bioinformatics Center's Second Annual Meeting.

Viruses·2018

Same author

Taxonomy of the family Arenaviridae and the order Bunyavirales: update 2018.

Archives of virology·2018

Same author

Evolution of Genome Architecture in Archaea: Spontaneous Generation of a New Chromosome in Haloferax volcanii.

Molecular biology and evolution·2018

Same author

Estimation of universal and taxon-specific parameters of prokaryotic genome evolution.

PloS one·2018

Same author

Vast diversity of prokaryotic virus genomes encoding double jelly-roll major capsid proteins uncovered by genomic and metagenomic sequence analysis.

Virology journal·2018

Search research articles

Video Experimental Relacionado

Updated: Apr 26, 2026

Solid Plate-based Dietary Restriction in Caenorhabditis elegans

Solid Plate-based Dietary Restriction in Caenorhabditis elegans

Published on: May 28, 2011

La restricción calórica en Lamarck.

Eugene V Koonin¹

¹National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD 20894, USA.

|July 19, 2014

Resumen

La herencia epigenética, previamente vista con ARN pequeño interferente (si) exógeno, ahora se muestra para el silenciamiento de genes inducido por la inanición. Este rasgo adquirido extiende la longevidad hasta la tercera generación, lo que sugiere que la herencia lamarckiana es un mecanismo evolutivo clave.

Más Videos Relacionados

Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli

Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli

Published on: August 18, 2023

Quantification of Information Encoded by Gene Expression Levels During Lifespan Modulation Under Broad-range Dietary Restriction in C. elegans

Quantification of Information Encoded by Gene Expression Levels During Lifespan Modulation Under Broad-range Dietary Restriction in C. elegans

Published on: August 16, 2017

Videos de Experimentos Relacionados

Last Updated: Apr 26, 2026

Solid Plate-based Dietary Restriction in Caenorhabditis elegans

Solid Plate-based Dietary Restriction in Caenorhabditis elegans

Published on: May 28, 2011

Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli

Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli

Published on: August 18, 2023

Quantification of Information Encoded by Gene Expression Levels During Lifespan Modulation Under Broad-range Dietary Restriction in C. elegans

Quantification of Information Encoded by Gene Expression Levels During Lifespan Modulation Under Broad-range Dietary Restriction in C. elegans

Published on: August 16, 2017

Área de la Ciencia:

La epigenética es la epigenética.
Biología evolutiva Biología evolutiva.
Biología Molecular Biología Molecular

Sus antecedentes:

La herencia epigenética a través del ARN pequeño interferente (si) está documentada en modelos animales.
Los rasgos adquiridos normalmente no se transmiten a la descendencia a través de la herencia.

Objetivo del estudio:

Para investigar la herencia de los cambios epigenéticos adquiridos.
Para determinar si el silenciamiento genético inducido por el medio ambiente puede ser heredado a través de generaciones.

Principales métodos:

Inducir el silenciamiento de genes a través de la inanición en un modelo animal.
Analizando patrones de expresión génica y modificaciones epigenéticas a través de múltiples generaciones.
Utilizando pequeños ARN interferentes endógenos (siARN) como mediadores de la herencia.

Principales resultados:

Se ha demostrado la herencia de un patrón de silenciamiento genético inducido por la inanición.
Se observó un aumento de la longevidad en la descendencia de la tercera generación.
Mostró el papel de los siRNAs endógenos en la transmisión de la información epigenética adquirida.

Conclusiones:

La herencia epigenética de los rasgos adquiridos, incluidos los inducidos por factores ambientales como el hambre, es posible.
Sugiere que la herencia de tipo Lamarckian de las características adquiridas es un fenómeno evolutivo significativo.
Destaca el papel de los siRNAs endógenos en la mediación de la herencia epigenética transgeneracional.