00:01
All right, so here we're looking at different mechanisms that may give researchers some suggestions as to why identical twins are not having the exact same medical outcomes in terms of their gene expression.
00:13
So the main force here is epigenetics, which is where external environmental factors can alter gene expression.
00:38
So let's say we have two identical twins.
00:44
They have the same dna because they're identical, which means it came from the same sperm and same egg.
00:51
So they have identical dna.
00:53
However, let's say this one is exposed to...
01:00
They're exposed to different environments, okay? this one is exposed to the red environment and this one is exposed to the green environment.
01:07
They grew up in different environments.
01:12
So even though they have the exact...
01:13
Same genetic makeup...