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Related Concept Videos

Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

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...
Phylogenetic Trees03:21

Phylogenetic Trees

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.The length of the branches can depict time or the relative amount of change among organisms. For instance, the branch length might indicate the number of amino acid changes in the sequence that underlies the...
Phylogenetic Trees03:21

Phylogenetic Trees

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.The length of the branches can depict time or the relative amount of change among organisms. For instance, the branch length might indicate the number of amino acid changes in the sequence that underlies the...
Microbial Phylogeny01:28

Microbial Phylogeny

Understanding the evolutionary relationships among microorganisms is fundamental to microbial ecology and taxonomy. Phylogenetic trees are essential tools for inferring these relationships, relying primarily on comparative analyses of molecular sequences such as DNA, RNA, or proteins. In microbial studies, these trees typically depict the evolutionary paths of diverse bacterial and archaeal species by mapping genetic differences accumulated over time.Phylogenetic trees are composed of tips,...
Phylogeny01:23

Phylogeny

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...
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Gene Evolution - Fast or Slow?

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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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
08:57

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

Combining data in phylogenetic analysis.

J P Huelsenbeck1, J J Bull, C W Cunningham

  • 1Dept of Integrative Biology, University of California, Berkeley, CA 94720-3140, USA.

Trends in Ecology & Evolution
|January 18, 2011
PubMed
Summary
This summary is machine-generated.

Systematists can combine diverse data like molecular and morphological information in phylogenetic analysis. This review examines methods for analyzing partitioned data to improve evolutionary insights and phylogenetic accuracy.

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A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
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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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Related Experiment Videos

Last Updated: Jun 5, 2026

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
08:57

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Published on: August 14, 2018

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
10:23

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Creating and Applying a Reference to Facilitate the Discussion and Classification of Proteins in a Diverse Group
07:49

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

Published on: August 16, 2017

Area of Science:

  • Systematics and evolutionary biology
  • Phylogenetic inference and data analysis

Background:

  • Systematists utilize diverse data sources, including molecular (e.g., nucleotide sequences) and morphological characters.
  • Integrating multiple data types presents analytical challenges in reconstructing evolutionary relationships.

Purpose of the Study:

  • To review methods for analyzing partitioned phylogenetic data.
  • To evaluate the advantages and disadvantages of different data combination approaches.
  • To identify methods that best reveal evolutionary processes and yield accurate phylogenies.

Main Methods:

  • Discussion of partitioned data analysis approaches: total evidence, separate analysis, and conditional combination.
  • Comparative analysis of the strengths and weaknesses of each method.
  • Focus on methods aiding evolutionary process discernment and phylogenetic accuracy.

Main Results:

  • Different methods offer varying degrees of insight into evolutionary processes.
  • The choice of method impacts the accuracy of phylogenetic estimates.
  • No single method is universally superior; context-dependent evaluation is crucial.

Conclusions:

  • Selecting the appropriate method for analyzing partitioned data is critical for robust phylogenetic reconstruction.
  • Understanding the implications of each approach enhances the interpretation of evolutionary history.
  • Further research can refine methods for integrating diverse character information.