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Related Concept Videos

X-Inactivation01:58

X-Inactivation

39.8K
The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
39.8K
Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

6.8K
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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Heterochromatin02:38

Heterochromatin

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The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at...
15.0K
Euchromatin01:01

Euchromatin

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The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
7.9K
Dosage Compensation02:50

Dosage Compensation

6.5K
In animals, gender is determined by the number and type of sex chromosome. For example, human females have two X chromosomes, and males have one X and one Y chromosome, whereas C.elegans with one X chromosome is a male, and the one with two X chromosomes is a hermaphrodite.
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with  distinct numbers of X chromosomes will...
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Epigenetic Regulation01:46

Epigenetic Regulation

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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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Related Experiment Video

Updated: Oct 13, 2025

Combined DNA-RNA Fluorescent In situ Hybridization FISH to Study X Chromosome Inactivation in Differentiated Female Mouse Embryonic Stem Cells
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Combined DNA-RNA Fluorescent In situ Hybridization FISH to Study X Chromosome Inactivation in Differentiated Female Mouse Embryonic Stem Cells

Published on: June 14, 2014

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Digging into X chromosome inactivation.

Edith Heard1, Claire Rougeulle2

  • 1Director's Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany.

Science (New York, N.Y.)
|November 18, 2021
PubMed
Summary

Researchers studied X chromosome inactivation in nonhuman primates, uncovering unexpected patterns. This research offers new insights into the complex genetic processes of these animals.

Area of Science:

  • Genetics
  • Primate Biology
  • Molecular Biology

Background:

  • X chromosome inactivation is a crucial process in female mammals for dosage compensation.
  • Previous studies primarily focused on humans and mice, leaving gaps in understanding in other species.
  • Nonhuman primates offer valuable models for studying mammalian genetics due to their evolutionary proximity to humans.

Purpose of the Study:

  • To investigate the patterns and mechanisms of X chromosome inactivation in diverse nonhuman primate species.
  • To identify any unique or conserved features of X chromosome inactivation in primates compared to established models.
  • To provide a foundation for future research into primate-specific genetic regulation and evolution.

Main Methods:

  • Utilizing advanced genomic sequencing techniques to analyze gene expression across X chromosomes.

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A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome
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A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome

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Quick Fluorescent In Situ Hybridization Protocol for Xist RNA Combined with Immunofluorescence of Histone Modification in X-chromosome Inactivation
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Quick Fluorescent In Situ Hybridization Protocol for Xist RNA Combined with Immunofluorescence of Histone Modification in X-chromosome Inactivation

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Related Experiment Videos

Last Updated: Oct 13, 2025

Combined DNA-RNA Fluorescent In situ Hybridization FISH to Study X Chromosome Inactivation in Differentiated Female Mouse Embryonic Stem Cells
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Combined DNA-RNA Fluorescent In situ Hybridization FISH to Study X Chromosome Inactivation in Differentiated Female Mouse Embryonic Stem Cells

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A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome
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A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome

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Quick Fluorescent In Situ Hybridization Protocol for Xist RNA Combined with Immunofluorescence of Histone Modification in X-chromosome Inactivation
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Quick Fluorescent In Situ Hybridization Protocol for Xist RNA Combined with Immunofluorescence of Histone Modification in X-chromosome Inactivation

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  • Employing bioinformatics to compare inactivation patterns between different primate species and sexes.
  • Performing comparative analyses with existing data from human and mouse X chromosome inactivation studies.

    • Main Results:

    • Observed significant variability in X chromosome inactivation patterns across different nonhuman primate species.
    • Identified instances of random and skewed X chromosome inactivation, with some species showing unique biases.
    • Discovered novel regulatory elements potentially influencing inactivation dynamics in primates.

    Conclusions:

    • X chromosome inactivation in nonhuman primates is more complex and diverse than previously assumed.
    • These findings challenge existing models and highlight the need for species-specific investigations.
    • Understanding primate X chromosome inactivation is vital for comparative genomics and evolutionary studies.