Gene Mutation Analysis
Gene Mutation Analysis - Related Videos
01:09
Mutation, Gene Flow, and Genetic Drift
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2026
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).Mechanisms of Genetic VariationThe original sources of genetic variation are mutations,...
04:34
Digital Droplet Polymerase Chain Reaction for Indel Mutation Detection in Target Genes
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2025
This video demonstrates the role of digital droplet polymerase chain reaction in identifying indel mutation in a DNA sample. The high precision and sensitivity of ddPCR enable accurate and consistent detection of rare mutations present in a sample, even at low levels. It can identify and quantify indel mutations in different regions of the genome, providing valuable insights into the mechanisms of mutation and the functional consequences of these mutations.
11:57
Saccharomyces cerevisiae Models of Alzheimer's Disease to Screen Genes, Mutations, and Chemicals Affecting Amyloid Beta Production by γ-Secretase
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2025
Here, we describe a yeast system reconstituting human γ-secretase. This system allows for the identification and study of mutations affecting activity and for screening of γ-secretase inhibitors (GSIs). Utilizing the loss of function properties of familial Alzheimer's disease mutants, it is possible to screen for γ-secretase modulators (GSMs).
00:36
Viral Mutations
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2019
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...
07:53
Quantification of Colonic Stem Cell Mutations
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Cited by 1 •
2015
We report significant improvements for the reproducible measurement of somatic colonic stem cell mutations after exposure of mice to potential DNA damaging agents.
FAQs
A substitution changes one nucleotide, whereas an insertion or deletion adds or removes sequence; larger rearrangements alter a more extensive DNA segment. Distinguishing these categories helps researchers describe the observed variant precisely before considering its possible effect on gene function, traits, or its relationship to disease.
A reference sequence provides the comparison point for assessing whether a nucleotide difference is present and where it occurs. This location and sequence context support characterization of the variant, while computational and experimental evidence helps evaluate whether it is benign, pathogenic, or associated with a phenotype.
Polymerase chain reaction selectively amplifies target regions of genetic material, producing enough of a chosen sequence for nucleotide comparison. Focusing on a defined region makes the analysis practical for investigating a particular gene or variant. The amplified material can then be examined against a reference.
An analysis generally proceeds from genetic material isolation to PCR amplification of the target region, followed by nucleotide sequence comparison with a reference. Researchers then characterize the change, classify its possible significance, and integrate computational with experimental evidence. This workflow connects a detected sequence difference to a biological interpretation.
Applications span inheritance studies, evolutionary investigations, genetic disorders, cancer research, and microbial adaptation. In these settings, the analysis can help connect DNA variation with traits, disease mechanisms, or changing biological populations. Its value depends on interpreting the sequence finding alongside the relevant computational and experimental evidence.
By linking a variant to an altered gene function, trait, or phenotype, researchers can investigate how disease mechanisms arise and assess whether the change is likely pathogenic or benign. In cancer and genetic disorder research, those interpretations can inform diagnosis and the development of targeted treatments.