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相关概念视频

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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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

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.
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The Tree of Life - Bacteria, Archaea, Eukaryotes02:40

The Tree of Life - Bacteria, Archaea, Eukaryotes

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The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
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Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes02:16

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The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
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相关实验视频

Updated: Jun 25, 2025

A Practical Guide to Phylogenetics for Nonexperts
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一本关于基因组推理的指南.

José S L Patané1, Joaquim Martins2, João Carlos Setubal3

  • 1Laboratório de Genética e Cardiologia Molecular, Instituto do Coração/Heart Institute Hospital das Clínicas - Faculdade de Medicina da Universidade de São Paulo São Paulo, São Paulo, SP, Brazil.

Methods in molecular biology (Clifton, N.J.)
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PubMed
概括

人类基因组学使用整个基因组重建进化历史. 这种方法提供了对物种关系和生物多样性的洞察,并提供了实践示例.

关键词:
基因树是一种基因树.遗传遗传网络是一种遗传网络.人类基因组学是什么?人类的家谱 (Phylogeny) 是一个学科.种类 树木 树木 种类整个基因组的整个基因组.

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相关实验视频

Last Updated: Jun 25, 2025

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科学领域:

  • 进化生物学是进化的生物学.
  • 系统学 系统学 系统学
  • 进行比较的基因组学.
  • 保护遗传学 保护遗传学

背景情况:

  • 遗传学利用整个基因组进行进化历史的重建.
  • 它在理解物种起源和关系方面具有广泛的应用.
  • 这一领域对于推动生物多样性和进化研究至关重要.

研究的目的:

  • 调查基因和物种树重建的遗传学概念和方法.
  • 为了解决类基因组分析中常见的陷.
  • 提供使用细菌基因组进行基因组学分析的实用例子.

主要方法:

  • 对遗传学概念和方法的审查.
  • 讨论现场共同的挑战和陷.
  • 一个基因组分析工作流程的演示.

主要成果:

  • 关于植物基因组技术的全面概述.
  • 在重建进化史时识别潜在的挑战.
  • 用一个案例研究说明的族群基因组方法的实际应用.

结论:

  • 遗传学为理解进化关系提供了强大的工具.
  • 意识到常见的陷对于准确的遗传学重建至关重要.
  • 所述示例有助于在实践中实现家族基因组学分析.