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Related Concept Videos

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.
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Evolutionary Relationships through Genome Comparisons02:54

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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

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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

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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

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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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What is Evolutionary History?02:35

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Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
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Updated: Jul 28, 2025

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
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Phylogenomic analyses provide insights into primate evolution.

Yong Shao1, Long Zhou2, Fang Li3,4

  • 1State Key Laboratory of Genetic Resources and Evolution, Kunming Natural History Museum of Zoology, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650201, China.

Science (New York, N.Y.)
|June 1, 2023
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This study analyzed 50 primate genomes to understand human evolution. Key genomic innovations in the Simiiformes ancestor likely drove primate diversity and human evolution.

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Area of Science:

  • Genomics
  • Evolutionary Biology
  • Comparative Genomics

Background:

  • Understanding primate genome evolution is crucial for human genetic architecture insights.
  • Primate diversity stems from complex evolutionary processes.
  • Previous studies lacked representation from key primate groups.

Purpose of the Study:

  • To conduct a comprehensive phylogenetic analysis of 50 primate genomes.
  • To identify genes under positive selection across primate lineages.
  • To pinpoint key genomic innovations influencing primate and human evolution.

Main Methods:

  • Comparative genomic analysis of 50 primate species.
  • Phylogenetic analysis incorporating 38 genera and 14 families.
  • Identification of genes under positive selection.

Main Results:

  • Revealed heterogeneous rates of genomic rearrangement and gene evolution.
  • Identified thousands of genes under positive selection in nervous, skeletal, and digestive systems.
  • Discovered significant genomic innovations at the Simiiformes ancestral node.

Conclusions:

  • Primate genomic evolution is characterized by lineage-specific adaptations.
  • Positive selection on specific genes facilitated primate innovations.
  • Early Simiiformes genomic innovations profoundly impacted primate radiation and human evolution.