Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Epistasis Analysis01:09

Epistasis Analysis

Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
Mismatch Repair01:20

Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
Mismatch Repair01:36

Mismatch Repair

Overview
Mutations in Microorganisms01:18

Mutations in Microorganisms

Mutations are heritable changes in an organism’s genome involving alterations in the base sequence of DNA or RNA. These changes can influence cellular processes and phenotypic traits, potentially transforming the unaltered wild type into a mutant form. Such changes, termed forward mutations, are pivotal in shaping the genetic diversity of organisms.RNA viruses exhibit the highest mutation rates due to the absence of robust proofreading mechanisms during genome replication. In contrast,...
Mutation, Gene Flow, and Genetic Drift01:09

Mutation, Gene Flow, and Genetic Drift

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,...
Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Adaptive Dynamics of Quantitative Traits in a Steadily Changing Environment.

Genetics·2026
Same author

Epistasis-mediated compensatory evolution in a fitness landscape with adaptational tradeoffs.

Proceedings of the National Academy of Sciences of the United States of America·2025
Same author

Comment on "ISO estimates of noise-induced hearing impairment" [J. Acoust. Soc. Am. 45(6), 3640-3646 (2019)].

The Journal of the Acoustical Society of America·2025
Same author

Graph-structured populations elucidate the role of deleterious mutations in long-term evolution.

Nature communications·2025
Same author

A Case Report of Right Atrial Thrombosis Complicated by Multiple Pulmonary Emboli: POCUS For the Win!

Journal of education & teaching in emergency medicine·2025
Same author

On the misuse of evolutionary theory to bolster the 'scientific' case for intelligent design: A cautionary note.

Journal of theoretical biology·2024
Same journal

Quantitative models of photoreceptor metabolisms: implications for rod outer segment length, retinal glycolysis and choroidal blood flow.

Physical biology·2026
Same journal

Mechanical interactions govern self-organized ordering in bacterial colonies on surfaces.

Physical biology·2026
Same journal

Robust chemotaxis beyond sensing limits: signal, noise, and strategy.

Physical biology·2026
Same journal

Ecological dynamics of pro-tumor and anti-tumor teams in the tumor microenvironment.

Physical biology·2026
Same journal

Swarms of female<i>Anopheles gambiae</i>mosquitoes may fracture when perturbed.

Physical biology·2026
Same journal

How exercise scheduling affects IL-6-mediated tumor suppression: a fixed exercise volume perspective.

Physical biology·2026
See all related articles

Related Experiment Video

Updated: Jun 23, 2026

Mutagenesis and Functional Selection Protocols for Directed Evolution of Proteins in E. coli
09:01

Mutagenesis and Functional Selection Protocols for Directed Evolution of Proteins in E. coli

Published on: March 16, 2011

Robustness and epistasis in mutation-selection models.

Andrea Wolff1, Joachim Krug

  • 1Institut für Theoretische Physik, Universität zu Köln, Köln, Germany. awolff@thp.uni-koeln.de

Physical Biology
|May 5, 2009
PubMed
Summary
This summary is machine-generated.

Phenotype robustness offers a fitness advantage against harmful mutations. This study clarifies theoretical models and confirms findings with numerical simulations, revealing insights into error thresholds.

More Related Videos

Following the Dynamics of Structural Variants in Experimentally Evolved Populations
04:52

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

Related Experiment Videos

Last Updated: Jun 23, 2026

Mutagenesis and Functional Selection Protocols for Directed Evolution of Proteins in E. coli
09:01

Mutagenesis and Functional Selection Protocols for Directed Evolution of Proteins in E. coli

Published on: March 16, 2011

Following the Dynamics of Structural Variants in Experimentally Evolved Populations
04:52

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

Area of Science:

  • Evolutionary dynamics
  • Theoretical biology
  • Computational genetics

Background:

  • Phenotype robustness is crucial for evolutionary stability.
  • Quasispecies models describe mutation-selection dynamics.
  • Fitness landscapes, especially mesa-shaped ones, are key to understanding adaptation.

Purpose of the Study:

  • To investigate the fitness advantage of phenotype robustness against deleterious mutations.
  • To reconcile conflicting theoretical treatments of robustness.
  • To explore error threshold behavior in epistatic landscapes.

Main Methods:

  • Deterministic mutation-selection models of the quasispecies type.
  • Analytic calculations, exact in the infinite sequence length limit.
  • Quantum mechanical analogy for finite sequence length corrections.
  • Numerical simulations for verification.

Main Results:

  • Analytic results for the robustness effect were obtained.
  • A contradiction between heuristic and rigorous treatments was resolved.
  • A correction term for finite sequence lengths was calculated.
  • Diminishing epistasis was identified as necessary but not sufficient for error threshold behavior.

Conclusions:

  • Phenotype robustness provides a significant fitness advantage.
  • The study provides a unified theoretical framework for robustness.
  • Error threshold dynamics are complex and depend on epistasis.