tic modification function to shut-off or silence genes? How does your chosen type of epigenetic modification get passed down from parent to offspring?...

RNA Silencing

1. How does your chose type of epigenetic modification function to shut-off or silence genes?
2. How does your chosen type of epigenetic modification get passed down from parent to offspring? In other words, how or is it inherited? Give an example if one is known.
3. Address the concept of environmentally-induced epigenetic changes. Is your chosen type of epigenetic modification caused by or can it potentially be caused by environmental factors?