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Videos de Conceptos Relacionados

Synteny and Evolution02:31

Synteny and Evolution

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John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
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Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

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Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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What is Evolutionary History?02:35

What is Evolutionary History?

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Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
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Phylogeny01:23

Phylogeny

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Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
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The Evidence for Evolution02:55

The Evidence for Evolution

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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.
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Gene Evolution - Fast or Slow?02:05

Gene Evolution - Fast or Slow?

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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...
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Video Experimental Relacionado

Updated: Oct 2, 2025

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
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Inferir la historia evolutiva del hombre

Jasmin Rees1,2, Aida Andrés1,2

  • 1UCL Genetics Institute, Department of Genetics, Evolution and Environnment, University College London, London, UK.

Science (New York, N.Y.)
|February 24, 2022
PubMed
Resumen

La genealogía genética ofrece un enfoque unificado para entender la evolución humana. Este método mejora nuestro conocimiento de las migraciones ancestrales y la dinámica de la población.

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Área de la Ciencia:

  • La evolución del hombre
  • Genética de las poblaciones
  • Genealogía genética

Sus antecedentes:

  • La comprensión de la historia evolutiva humana se basa en diversas fuentes de datos.
  • La integración de los datos genéticos y genealógicos presenta desafíos y oportunidades únicas.

Objetivo del estudio:

  • Para demostrar cómo un enfoque unificado de genealogía genética puede mejorar el estudio de la evolución humana.
  • Explorar el potencial de los conjuntos de datos integrados para reconstruir las estructuras de la población ancestral.

Principales métodos:

  • Desarrollo de nuevos algoritmos para unificar conjuntos de datos genéticos y genealógicos dispares.
  • Aplicación de métodos computacionales para analizar la información genómica y ancestral a gran escala.
  • Análisis comparativo de modelos evolutivos con y sin datos unificados.

Principales resultados:

  • El enfoque de la genealogía genética unificada mejora significativamente la resolución de las líneas de tiempo evolutivas humanas.
  • Se identificaron con mayor precisión los principales eventos de migración ancestral y los patrones de mezcla de poblaciones.
  • Comprensión mejorada de las presiones selectivas que dan forma a las poblaciones humanas.

Conclusiones:

  • La genealogía genética unificada proporciona un marco poderoso para el avance de la investigación evolutiva humana.
  • Esta metodología integrada ofrece una visión sin precedentes del pasado de nuestra especie.
  • Los estudios futuros pueden aprovechar este enfoque para abordar preguntas evolutivas complejas.