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Related Concept Videos

Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

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Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
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Mutations in Microorganisms01:18

Mutations in Microorganisms

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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,...
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Genetic Variation01:25

Genetic Variation

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Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
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Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

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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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Gene-Environment Interactions01:20

Gene-Environment Interactions

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Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
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Factors Influencing Microbial Growth: Temperature01:27

Factors Influencing Microbial Growth: Temperature

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Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
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Related Experiment Video

Updated: Jul 27, 2025

High-Throughput Live Imaging of Microcolonies to Measure Heterogeneity in Growth and Gene Expression
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Genetic variation and function: revealing potential factors associated with microbial phenotypes.

Xiaolin Liu1,2, Yue Ma1,2, Jun Wang1,2

  • 1CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.

Biophysics Reports
|June 8, 2023
PubMed
Summary

This review explores how genetic variations in microbes and hosts influence phenotypes. It highlights advances in analyzing microbial functions, drug resistance, and host-microbe interactions, paving the way for future research.

Keywords:
Association analysisComparative analysisGenetic variationMicrobiomePhenotype

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Area of Science:

  • Microbiology
  • Genomics
  • Bioinformatics

Background:

  • Advances in sequencing technology yield vast microbial and host genomic data.
  • Genetic variations are increasingly linked to phenotypes, enhancing understanding of microbial functions.

Purpose of the Study:

  • To review the application of association analysis in microbes like Mycobacterium tuberculosis.
  • To summarize host genetic factors associated with microbial phenotypes and microbiome traits.
  • To discuss challenges and solutions in gene-function analysis of microbes and microbiomes.

Main Methods:

  • Association analysis for microbial genetic variants and phenotypes (e.g., drug resistance).
  • Comparative genomic and transcriptomic methods for identifying microbial genetic factors.
  • Analysis of host genetic variations linked to microbial phenotypes and microbiome composition.

Main Results:

  • Screening of microbial genetic variants associated with drug resistance, pathogenesis, and drug targets.
  • Identification of host genetic factors influencing susceptibility, microbial load, and microbiome traits.
  • Summary of recent findings on host genetic variations impacting microbial phenotypes.

Conclusions:

  • Gene-function analysis in microbes and microbiomes is an emerging field with significant potential.
  • Understanding the history, current status, and challenges is crucial for advancing this area.
  • Future research should focus on overcoming existing hurdles to fully realize the potential of gene-function analysis.