Ghost in Your Genes

So I watched the "Ghost in your Genes" video and it is so fascinating. I mean it's easy to see how the choices of your parents affect you; where they chose to live, if the mother takes car of herself when she is pregnant so on and so forth. But to think what your grandparents do, what your great- grandparents do can affect you is really cool. In the video they talked about Epigenetics- its when certain things attach to your chromosomes to turn them "on and off". Kieran, the child that had Beckwith Wiedemann syndrome could have gotten that because his parents used IVF (IVF increases the chances of Beckwith Wiedemann syndrome by 3-4 times). There is a possibility that it could be passed onto his children, so decisions Kieran's parents made could effect their grandchildren. They also discussed in the video how malnutrition in developmental times for a female can prevent the body from growing. When she becomes pregnant, they think it may affect the size of the fetus which could theoretically make every generation smaller and smaller. It's interesting and kind of freaky. The things I do now could change future generations. At first scientists thought that once genes were created, that was it they were set in stone. But now they're beginning to learn that they could be subject to change. I wonder what things my grandparents and my greatgrandparents did that shaped my genetics???? It's too interesting.