What is Epigenetics _ It’s Meaning and Definition The study of heritable changes in gene
What is Epigenetics _ It’s Meaning and Definition The study of heritable changes in gene
Contents
What is Epigenetics?
Epigenetics is the study of heritable changes in gene expression that do not involve changes in the DNA sequence. These changes can be influenced by environmental factors, lifestyle, and experiences, affecting how genes are turned “on” or “off.”
Definition of Epigenetics
Epigenetics refers to modifications in gene activity that can be passed down to future generations without altering the underlying DNA sequence.
Key Mechanisms of Epigenetics:
- DNA Methylation – The addition of methyl groups (-CH₃) to DNA, usually silencing gene expression.
- Histone Modification – Chemical changes to proteins (histones) around which DNA is wrapped, influencing gene accessibility.
- Non-Coding RNA – Molecules that help regulate gene expression without coding for proteins.
Example of Epigenetics in Action
- Identical twins have the same DNA, but due to epigenetic factors, one may develop a disease while the other does not.
- Environmental influences, such as diet, stress, and toxins, can modify gene expression patterns without changing the DNA itself.
Would you like more detailed examples or applications of epigenetics?
