Given that backdrop, epigenetics, how is it different from our fixed DNA sequence?

Yeah, that's a great question.

So I like to think about epigenetics If you think back to your biology classes, that DNA has all the information that tells your body what to do.

So I like to think of it kind of like the library of the cell, that it has all the pages, all the books that... tells all our cells and bodies what they need to do.

The problem is there are a lot of books.

I'm here at a university.

If you come to visit my university library, we also have a lot of books in that library.

Why is methylation so critical during pregnancy and early development?