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相关概念视频

Synteny and Evolution02:31

Synteny and Evolution

3.3K
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...
3.3K
Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

5.9K
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...
5.9K
Phylogeny01:23

Phylogeny

44.7K
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.
44.7K
Phylogenetic Trees03:21

Phylogenetic Trees

45.7K
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.
45.7K
Gene Evolution - Fast or Slow?02:05

Gene Evolution - Fast or Slow?

7.2K
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...
7.2K
What is Evolutionary History?02:35

What is Evolutionary History?

37.1K
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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相关实验视频

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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基因组学分析提供了关于灵长类动物进化的见解

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
概括
此摘要是机器生成的。

这项研究分析了50种灵长类的基因组, 在Simiiformes祖先的关键基因组创新可能推动了灵长类的多样性和人类进化.

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A Practical Guide to Phylogenetics for Nonexperts
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Dissecting the Non-human Primate Brain in Stereotaxic Space
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Dissecting the Non-human Primate Brain in Stereotaxic Space

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相关实验视频

Last 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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科学领域:

  • 基因组学
  • 进化生物学
  • 比较基因组学

背景情况:

  • 了解灵长类基因组进化对于人类遗传结构的洞察至关重要.
  • 灵长类的多样性源于复杂的进化过程.
  • 之前的研究缺乏主要灵长类群体的代表性.

研究的目的:

  • 进行50种灵长类基因组的综合遗传分析.
  • 在灵长类血统中通过积极选择识别基因.
  • 确定影响灵长类和人类进化的关键基因组创新.

主要方法:

  • 50种灵长类动物的基因组比较分析.
  • 植物遗传学分析包括38个属和14个家族.
  • 在积极选择下识别基因.

主要成果:

  • 揭示了基因组重组和基因进化的异质速率.
  • 在神经,骨和消化系统中确定了成千上万的基因.
  • 在Simiiformes祖先节点发现了重要的基因组创新.

结论:

  • 灵长类动物的基因组进化是由特定的适应特征.
  • 对特定基因的积极选择促进了灵长类的创新.
  • 早期的Simiiformes基因组创新对灵长类辐射和人类进化产生了深远的影响.