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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

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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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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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Phylogenetic Trees03:21

Phylogenetic Trees

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Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
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Gene Evolution - Fast or Slow?02:05

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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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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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Updated: Jul 28, 2025

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

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Los análisis filogenómicos proporcionan información sobre la evolución de los primates

Yong Shao1, Long Zhou2, Fang Li3,4

  • 1State Key Laboratory of Genetic Resources and Evolution, Kunming Natural History Museum of Zoology, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650201, China.

Science (New York, N.Y.)
|June 1, 2023
PubMed
Resumen
Este resumen es generado por máquina.

Este estudio analizó 50 genomas de primates para entender la evolución humana. Las innovaciones genómicas clave en el antepasado Simiiformes probablemente impulsaron la diversidad de los primates y la evolución humana.

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Área de la Ciencia:

  • La genómica
  • Biología evolutiva
  • Genómica comparada

Sus antecedentes:

  • La comprensión de la evolución del genoma de los primates es crucial para la comprensión de la arquitectura genética humana.
  • La diversidad de los primates proviene de procesos evolutivos complejos.
  • Los estudios anteriores carecían de representación de los principales grupos de primates.

Objetivo del estudio:

  • Para llevar a cabo un análisis filogenético completo de 50 genomas de primates.
  • Para identificar genes bajo selección positiva a través de linajes de primates.
  • Para identificar las innovaciones genómicas clave que influyen en la evolución de los primates y los humanos.

Principales métodos:

  • Análisis genómico comparativo de 50 especies de primates.
  • Análisis filogenético que incorpora 38 géneros y 14 familias.
  • Identificación de genes bajo selección positiva.

Principales resultados:

  • Reveló tasas heterogéneas de reordenamiento genómico y evolución de genes.
  • Identificó miles de genes bajo selección positiva en los sistemas nervioso, esquelético y digestivo.
  • Descubrió innovaciones genómicas significativas en el nodo ancestral de los Simiiformes.

Conclusiones:

  • La evolución genómica de los primates se caracteriza por adaptaciones específicas del linaje.
  • La selección positiva en genes específicos facilitó las innovaciones de los primates.
  • Las primeras innovaciones genómicas de Simiiformes impactaron profundamente la radiación de los primates y la evolución humana.