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Related Concept Videos

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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Gene Evolution - Fast or Slow?02:05

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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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Synteny and Evolution02:31

Synteny and Evolution

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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...
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Phylogeny01:23

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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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Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

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Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
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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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Updated: Nov 21, 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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Phylodynamics for cell biologists.

T Stadler1,2, O G Pybus3, M P H Stumpf4

  • 1Department of Biosystems Science and Engineering, ETH Zürich, Switzerland. tanja.stadler@bsse.ethz.ch oliver.pybus@zoo.ox.ac.uk mstumpf@unimelb.edu.au.

Science (New York, N.Y.)
|January 15, 2021
PubMed
Summary
This summary is machine-generated.

Understanding cell lineage and evolution requires phylogenetic and phylodynamic approaches. Applying "tree thinking" and ecological null models enhances the analysis of single-cell data for biological insights.

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Last Updated: Nov 21, 2025

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Area of Science:

  • Evolutionary biology
  • Cell biology
  • Systems biology

Background:

  • Multicellular organisms exhibit complex cellular dynamics driven by cell birth, death, and inheritance.
  • These dynamics are fundamental to development, differentiation, and the emergence of diseases like cancer.
  • Recent molecular biology advancements enable single-cell resolution studies of cellular composition, ancestry, and evolution.

Purpose of the Study:

  • To introduce phylogenetic and phylodynamic approaches for analyzing single-cell biological data.
  • To highlight the importance of "tree thinking" in interpreting cell-level data.
  • To demonstrate the utility of ecological null models in statistical hypothesis testing for single-cell studies.

Main Methods:

  • Phylogenetic and phylodynamic analyses applied to single-cell data.
  • "Tree thinking" conceptual framework for data interpretation.
  • Ecological null models for statistical hypothesis testing.

Main Results:

  • Phylogenetic and phylodynamic methods offer powerful tools for understanding cell lineage and evolution.
  • "Tree thinking" provides a crucial lens for interpreting complex single-cell datasets.
  • Ecological null models improve the rigor of statistical inference in cell biology.

Conclusions:

  • Integrating phylogenetic and phylodynamic approaches with single-cell biology is essential.
  • Theoretical developments, including "tree thinking" and null models, are needed to fully leverage single-cell data.
  • Advancements in experimental cell biology must be complemented by theoretical frameworks for deeper insights into cellular dynamics.