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The evolution of genomic imprinting.

H S Chandra1, V Nanjundiah

  • 1Centre for Cellular and Molecular Biology, Hyderabad, India.

Development (Cambridge, England). Supplement
|January 1, 1990
PubMed
Summary

Genomic imprinting, a phenomenon where only one copy of a gene is expressed, may have driven the evolution of sex determination and sexual dimorphism. This epigenetic process could also influence sex ratios and anisogamy.

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Area of Science:

  • Evolutionary Biology
  • Epigenetics
  • Genetics

Background:

  • Genomic imprinting involves the differential expression of alleles based on parental origin.
  • Understanding the evolutionary origins of imprinting is crucial for comprehending its role in development and reproduction.

Purpose of the Study:

  • To explore potential evolutionary pathways for genomic imprinting.
  • To investigate the link between imprinting, sex determination, and sexual dimorphism.
  • To examine imprinting's role in anisogamy and sex ratio evolution.

Main Methods:

  • Theoretical exploration of imprinting's evolutionary advantages.
  • Analysis of imprinting's potential role in sex determination models.
  • Consideration of imprinting's co-evolution with other reproductive traits.

Main Results:

  • Imprinting may confer advantages by creating different phenotypes from imprinted and unimprinted alleles.
  • Imprinting could be a fundamental driver for the evolution of sex determination and sexual dimorphism.
  • Imprinting might influence sex ratio evolution and reinforce anisogamy.

Conclusions:

  • Genomic imprinting offers a plausible mechanism for the evolution of key biological processes.
  • Further research is needed to fully elucidate the evolutionary trajectories of imprinting.

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