Genome Comparison
Genome Comparison - Related Videos
02:54
Evolutionary Relationships through Genome Comparisons
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2021
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...
08:31
Isolation and Genome Analysis of Single Virions using 'Single Virus Genomics'
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Cited by 2 •
2013
Single Virus Genomics (SVG) is a method to isolate and amplify the genomes of single virons. Viral suspensions of a mixed assemblage are sorted using flow cytometry onto a microscope slide with discrete wells containing agarose, thereby capturing the virion and reducing genome shearing during downstream processing. Whole genome amplification is achieved using multiple displacement amplification (MDA) resulting in genomic material that is suitable for sequencing.
02:02
Genomics
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2020
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
08:31
Genome Editing
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2023
A well-established technique for modifying specific sequences in the genome is gene targeting by homologous recombination, but this method can be laborious and only works in certain organisms. Recent advances have led to the development of “genome editing”, which works by inducing double-strand breaks in DNA using engineered nuclease enzymes guided to target genomic sites by either proteins or RNAs that recognize specific sequences. When a cell attempts to repair this damage, mutations can be...
02:57
The Sense of Self: Reflected Self-Appraisal and Social Comparison
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2020
According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
FAQs
Genome comparison depends on aligning DNA sequences so that corresponding regions can be examined position by position. This arrangement allows researchers to distinguish shared sequence features from differences between organisms, individuals, or cell populations. Once regions are matched, substitutions, insertions, and deletions can be recognized in context rather than treated as isolated changes.
Conserved genes and syntenic regions provide different but complementary clues. A conserved gene is retained across compared genomes, whereas synteny refers to preservation of the relative arrangement of genomic regions. Shared conservation may point to essential biological functions, while matching regional organization can support inference about evolutionary relationships. These signals help prioritize regions for further study.
Different comparison targets support different biological questions. Comparisons among organisms can highlight evolutionary relationships and adaptation; comparisons among individuals can identify differences associated with traits; and comparisons between reference and sample genomes can expose mutations linked to pathogens or disease. The same sequence difference therefore gains meaning from the biological context in which it is examined.
In a comparison, researchers align the selected genome sequences and locate corresponding regions. They then inspect conserved features and regional organization, record substitutions, insertions, deletions, and gene gains or losses, and relate the findings to the biological question. This workflow produces candidate differences or shared features for interpretation and for developing testable hypotheses.
In genome annotation, comparisons help identify and describe genomic features by using corresponding sequences and conserved genes. For phylogenetic analysis, shared and differing regions contribute evidence about relationships among organisms. In disease-variant investigation, comparing a reference with a sample can reveal mutations associated with disease. Thus, one comparative framework supports both genome interpretation and biological relationship studies.
In biology, comparing genomes can connect sequence variation with broader questions about diversity and function. Differences among organisms may suggest patterns of adaptation, while differences in pathogen or disease-associated samples can guide investigation of relevant mutations. These comparisons help researchers generate testable hypotheses about how genomic regions may contribute to observed traits or conditions.