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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...
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,...
Gene Evolution - Fast or Slow?02:05

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

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...
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...

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Related Experiment Video

Updated: Jun 3, 2026

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
08:57

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

Improving animal phylogenies with genomic data.

Maximilian J Telford1, Richard R Copley

  • 1Department of Genetics, Evolution and Environment, University College London, Darwin Building, Gower Street, London WC1E 6BT, UK. m.telford@ucl.ac.uk

Trends in Genetics : TIG
|March 19, 2011
PubMed
Summary

Genomic data aids evolutionary biologists in reconstructing early animal evolution and understanding animal phyla relationships. Improved evolutionary models and sampling are minimizing errors for a well-resolved animal evolutionary tree.

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Last Updated: Jun 3, 2026

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Published on: August 14, 2018

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12:00

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Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations
08:03

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

Published on: December 7, 2021

Area of Science:

  • Evolutionary biology
  • Genomics
  • Phylogenetics

Background:

  • Animal genome sequencing has advanced significantly over the past decade.
  • Genome sequences are crucial for understanding evolutionary relationships among animal phyla.
  • Challenges exist in accurately reconstructing phylogenies due to limited understanding of genomic character evolution.

Purpose of the Study:

  • To explore the utility of genomic data in reconstructing early animal evolution.
  • To address the challenges in phylogenetic reconstruction using genomic information.
  • To forecast the future resolution of the animal phyla tree.

Main Methods:

  • Analysis of primary sequence data and gene/genome structures.
  • Investigating modes of evolution for various genomic characters.
  • Developing improved evolutionary models based on character evolution understanding.
  • Increasing taxonomic sampling density in phylogenetic analyses.

Main Results:

  • Genomic data provides insights into early animal evolution and phyla relationships.
  • Understanding character evolution is key to overcoming phylogenetic reconstruction difficulties.
  • New models and denser sampling are actively reducing errors in phylogeny reconstruction.

Conclusions:

  • Genomic data is a powerful tool for understanding animal evolution.
  • Continued research into genomic character evolution will refine phylogenetic accuracy.
  • A well-resolved tree of animal phyla is anticipated in the near future.