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Related Concept Videos

Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

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 DNA...
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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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X-chromosome...
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Bridging the transgenerational gap with epigenetic memory.

Jana P Lim1, Anne Brunet

  • 1Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA.

Trends in Genetics : TIG
|February 16, 2013
PubMed
Summary
This summary is machine-generated.

Transgenerational epigenetic inheritance challenges traditional genetics by showing acquired traits can persist across generations. This field explores mechanisms like chromatin modifications and RNA in animals, from worms to humans.

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Area of Science:

  • Genetics and Epigenetics
  • Evolutionary Biology

Background:

  • Genetics traditionally dictates trait inheritance, with epigenetic changes typically reset each generation.
  • Recent research indicates some epigenetic modifications can be inherited across generations, influencing phenotypes.

Purpose of the Study:

  • To survey recent examples of transgenerational epigenetic inheritance in animals.
  • To describe methods and challenges in studying this phenomenon.
  • To review evidence for underlying mechanisms and evolutionary implications.

Main Methods:

  • Literature review of recent studies on transgenerational epigenetic inheritance.
  • Analysis of examples across diverse animal models (e.g., Caenorhabditis elegans, humans).
  • Examination of proposed molecular mechanisms (chromatin, RNA).

Main Results:

  • Evidence for transgenerational epigenetic inheritance exists in various animal species.
  • Chromatin modifications and RNA molecules are implicated as key mechanisms.
  • Studying this phenomenon presents specific methodological approaches and limitations.

Conclusions:

  • Transgenerational epigenetic inheritance represents a significant departure from classical genetic inheritance.
  • Further research is needed to fully understand its mechanisms and evolutionary impact.
  • This field offers new perspectives on heredity and adaptation.