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Genetic Screens02:46

Genetic Screens

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Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which...
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Single Nucleotide Polymorphisms-SNPs01:05

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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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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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Genome-wide Association Studies-GWAS01:11

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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.
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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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Related Experiment Video

Updated: Nov 26, 2025

Live Imaging and Quantification of Viral Infection in K18 hACE2 Transgenic Mice Using Reporter-Expressing Recombinant SARS-CoV-2
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Using Genetics To Dissect SARS-CoV-2 Infection.

Patrick Brest1, Baharia Mograbi1, Paul Hofman2

  • 1Université Côte d'Azur, Institute of Research on Cancer and Aging in Nice (IRCAN), Centre Antoine Lacassagne, Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), Fédération Hospitalo-Universitaire (FHU) OncoAge, F-06189 Nice, France.

Trends in Genetics : TIG
|December 14, 2020
PubMed
Summary
This summary is machine-generated.

Researchers identified crucial cellular pathways for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection using CRISPR screening. Findings may reveal new drug targets for treating coronavirus disease (COVID-19).

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Area of Science:

  • Virology
  • Genetics
  • Drug Discovery

Background:

  • Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes COVID-19, a global health crisis.
  • Understanding host-pathogen interactions is critical for developing effective treatments.

Purpose of the Study:

  • To identify host cellular pathways essential for SARS-CoV-2 infectivity.
  • To discover potential targets for antiviral therapies.

Main Methods:

  • Utilized CRISPR-based whole-genome screening.
  • Analyzed cellular pathways influencing viral entry and replication.

Main Results:

  • Identified key genes and pathways that regulate SARS-CoV-2 infection.
  • Provided a comprehensive map of host factors critical for viral propagation.

Conclusions:

  • The study offers insights into the molecular mechanisms of SARS-CoV-2 pathogenesis.
  • Results may guide the development of novel therapeutic strategies or drug repositioning for COVID-19 treatment.