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Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

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Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
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Gregor Mendel's pioneering work on the principles of inheritance fundamentally transformed our understanding of how traits are transmitted from generation to generation. His experiments with pea plants laid the groundwork for the discovery of genes, discrete units within organisms that control heredity.
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Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Updated: Mar 12, 2026

Author Spotlight: RNAi Inheritance and ChIP in C. elegans
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Epigenetic Inheritance across the Landscape.

Amy V Whipple1, Liza M Holeski1

  • 1Department of Biological Sciences and Merriam-Powell Center for Environmental Research, Northern Arizona University Flagstaff, AZ, USA.

Frontiers in Genetics
|November 10, 2016
PubMed
Summary

Epigenomic variation in plants influences adaptive traits and can be inherited across generations. Understanding this epigenetic inheritance is crucial for landscape genomics and evolutionary studies.

Keywords:
adaptationepigeneticsepigenomelandscape genomicsphenotypetransgenerational plasticity

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Area of Science:

  • Ecology and evolutionary biology
  • Plant sciences
  • Genomics

Background:

  • Epigenomic variation, heritable changes in gene expression not caused by DNA sequence alterations, can influence adaptive traits in plants.
  • Transgenerational plasticity, driven by epigenetic marks, plays a role in plant adaptation but its extent remains largely unknown.
  • Landscape genomics aims to identify genomic regions linked to adaptation across diverse environments.

Approach:

  • This review synthesizes current literature on landscape-level epigenomic variation in plants.
  • It examines the interplay between epigenetics, environment, and genome in shaping adaptive variation.
  • The study discusses methodologies for investigating transgenerational epigenetic inheritance.

Key Points:

  • Plant epigenomes exhibit greater isolation by distance and environment compared to their genomes.
  • Environmental factors clearly influence epigenomic variation within a single generation.
  • Demonstrating transgenerational epigenetic inheritance requires complex experimental designs.

Conclusions:

  • Epigenetic inheritance can impact the interpretation of landscape genomic studies, particularly those relying on phenotypic data.
  • Landscape genomic approaches using outlier analyses or genome-environment associations may be less affected by epigenetic inheritance.
  • Multi-generation common garden experiments are proposed to disentangle the roles of heritable epigenetic variation in plant adaptation.