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相关概念视频

Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

5.7K
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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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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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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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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Multi-species Conserved Sequences02:51

Multi-species Conserved Sequences

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Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale  studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
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Speciation Rates01:07

Speciation Rates

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Overview
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相关实验视频

Updated: Jul 8, 2025

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

Published on: August 14, 2018

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从多个连续字符中对字系的快速贝叶斯推断.

Rong Zhang1, Alexei J Drummond2,3, Fábio K Mendes4

  • 1Programme in Emerging Infectious Diseases, Duke-NUS Medical School 169857, Singapore.

Systematic biology
|December 12, 2023
PubMed
概括

这项研究引入了新的基因组学方法,以使用连续的形态数据来估计进化分歧时间. 这些进步提高了时间尺度上的家族遗传树的准确性,这对于进化生物学研究至关重要.

关键词:
布朗的运动 布朗的运动肉食动物 肉食动物连续的形态结构.总的证据是总的证据.

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A Practical Guide to Phylogenetics for Nonexperts
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A Practical Guide to Phylogenetics for Nonexperts

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Creating and Applying a Reference to Facilitate the Discussion and Classification of Proteins in a Diverse Group
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Creating and Applying a Reference to Facilitate the Discussion and Classification of Proteins in a Diverse Group

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相关实验视频

Last Updated: Jul 8, 2025

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
08:57

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

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A Practical Guide to Phylogenetics for Nonexperts
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A Practical Guide to Phylogenetics for Nonexperts

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科学领域:

  • 进化生物学是进化的生物学.
  • 人类遗传学 是一个学科.
  • 计算生物学是一种计算生物学.

背景情况:

  • 时间尺度上的家族遗传树对于进化研究至关重要.
  • 估计分歧时间具有挑战性,通常需要化石或形态数据.
  • 将连续形态学数据纳入遗传学中的方法尚不发达.

研究的目的:

  • 实施和验证用于在遗传学中使用连续形态学的最先进的方法.
  • 为了能够估计绝对和相对分歧时间的不确定性.
  • 整合多种数据类型,以便进行可靠的遗传学分析.

主要方法:

  • 为连续形态数据开发和应用先进的遗传学方法.
  • 进行了广泛的模拟研究,以验证方法属性.
  • 集成的分子序列 (DNA) 和离散和连续的形态特征.

主要成果:

  • 通过验证的方法来利用植物遗传学中的连续形态学.
  • 从各种数据中准确估计分歧时间.
  • 成功分析了一组不同类型的食肉动物的数据集.

结论:

  • 开发的方法有效地结合了持续形态学,用于时间尺度的遗传学.
  • 这些工具提高了进化分歧时间的估计.
  • 未来的研究应该探索这些遗传学方法的进一步应用和改进.