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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...
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...
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,...
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.
Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

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...
Genome-wide Association Studies-GWAS01:11

Genome-wide Association Studies-GWAS

Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...

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Related Experiment Video

Updated: May 13, 2026

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

Key operational considerations for biogeographical ancestry prediction capabilities.

Felicity Poulsen1, Lyn Griffiths2, Larisa Haupt3

  • 1Genomics Research Centre, Centre for Genomics and Personalised Health, School of Biomedical Sciences, Queensland University of Technology (QUT), Kelvin Grove, QLD, Australia; Forensic Biology/DNA Unit, Forensic & Analytical Science Service, NSW Health Pathology, Sydney, NSW, Australia.

Forensic Science International
|May 11, 2026
PubMed
Summary
This summary is machine-generated.

Biogeographical ancestry (BGA) prediction is a key Forensic DNA Intelligence (FDI) tool for identifying individuals from biological evidence. This review highlights critical components for developing and validating BGA methods to improve casework applications.

Keywords:
Biogeographical ancestry predictionForensic DNA intelligenceInvestigationOperational implementationValidation

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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

Related Experiment Videos

Last Updated: May 13, 2026

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

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
08:57

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

Area of Science:

  • Forensic Science
  • Genetics
  • Biotechnology

Background:

  • Biogeographical ancestry (BGA) prediction is a crucial Forensic DNA Intelligence (FDI) tool.
  • FDI aids investigations when standard DNA analysis fails to identify a suspect.
  • Significant advancements in ancestry informative markers and analysis tools have occurred over two decades.

Purpose of the Study:

  • To identify critical components of operational BGA prediction methods.
  • To highlight considerations for method development, optimization, validation, and interpretation.
  • To pinpoint areas requiring further research to enhance BGA capabilities.

Main Methods:

  • Review of existing research on BGA prediction tools and methods.
  • Analysis of components critical for operational BGA prediction.
  • Identification of best practices for method development and validation.

Main Results:

  • BGA prediction has been successfully applied in casework internationally.
  • Critical components for operational BGA methods have been identified.
  • Areas for future research to improve BGA prediction accuracy and utility are highlighted.

Conclusions:

  • Operational BGA prediction methods require careful development, validation, and interpretation.
  • Continued research is essential to enhance the capabilities and application of BGA prediction in forensic casework.
  • Standardized approaches to BGA method development will improve its reliability and casework utility.