epigenetic modulation of penetrance, and/or heritability. environment causes biochemical changes of the state of the DNA. methylation is a common phenomenon.

epigenetic modulation of penetrance, and/or heritability. environment causes biochemical changes of the state of the DNA. methylation is a common phenomenon. also, vertical transmission of DNA state facilitating transcription factor modulation of constituative expression. this one is a complex concept but is also a common example. sums up to, physical state of DNA can be transferred and conserved, during replication.