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Genomic Imprinting and Inheritance

Genomic Imprinting and Inheritance

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.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...

Epigenetic Regulation

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.

Epigenetic Regulation

Epigenetic Regulation

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.
X-chromosome...

In-vitro Mutagenesis

In-vitro Mutagenesis

To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.

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Related Experiment Video

Updated: Mar 17, 2026

Chromatin Immunoprecipitation Assay for Tissue-specific Genes using Early-stage Mouse Embryos

Chromatin Immunoprecipitation Assay for Tissue-specific Genes using Early-stage Mouse Embryos

Published on: April 29, 2011

Epigenetic Control of Early Mouse Development.

C Y Lim¹, B B Knowles², D Solter³

¹Institute of Medical Biology, A*STAR, Singapore, Singapore.

Current Topics in Developmental Biology

|August 1, 2016

Summary

This summary is machine-generated.

Mammalian genome activation begins with epigenetic reprogramming of sperm and egg DNA. This process is crucial for establishing a totipotent zygote and initiating embryonic development.

Keywords:

DNA methylation Early mammalian development Epigenesis Epigenetics Histones Preformation Retrotransposons

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Last Updated: Mar 17, 2026

Chromatin Immunoprecipitation Assay for Tissue-specific Genes using Early-stage Mouse Embryos

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Published on: April 29, 2011

Loss- and Gain-of-function Approach to Investigate Early Cell Fate Determinants in Preimplantation Mouse Embryos

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Quantitative Analysis of Protein Expression to Study Lineage Specification in Mouse Preimplantation Embryos

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Published on: February 22, 2016

Area of Science:

Developmental Biology
Epigenetics
Genomics

Background:

Sperm and egg genomes are transcriptionally silent due to hypermethylation.
Gametogenesis creates distinct epigenomes in sperm and eggs.
Reprogramming is essential for zygote totipotency and blastocyst inner cell mass pluripotency.

Purpose of the Study:

To elucidate the molecular mechanisms driving mammalian genome activation post-fertilization.
To identify key factors influencing the transition from transcriptional silence to activation.

Main Methods:

Review of existing literature on epigenetic modifications.
Analysis of DNA and histone modifications.
Investigation of retrotransposon activity and cytoplasmic factors.

Main Results:

Identified critical roles of DNA/histone modifications in genome activation.
Highlighted the importance of retrotransposon regulation.
Emphasized the influence of cytoplasmic factors in early embryonic transcription.

Conclusions:

Mammalian genome activation is a complex, multi-faceted process.
Epigenetic reprogramming, retrotransposon dynamics, and cytoplasmic factors are key regulators.
Further research is needed to fully understand the initiation of new life at the molecular level.