👉 Epigenesis is a mechanism by which genes can be passed down through generations without changing their expression levels or activity. This means that changes in DNA, RNA and protein sequences are not necessarily harmful or damaging to an organism's health, although they may be inherited from parents who have undergone some form of genetic modification (like radiation, surgery, etc.). Epigenetics is the study of how these modifications occur and can affect gene expression without altering the original DNA sequence.