Identical twins separated at birth give us insights into the interplay between genetic and environmental influences on our behaviour and our traits.
These twin studies help scientists like Dr Nancy Segal understand what makes us who we are – and what role our genes have in shaping us.
https://www.bbc.com/reel/video/p0bn70nw/nature-vs-nurture-how-your-genes-shape-who-you-are
Produced by Melissa Hogenboom
Animation by Stefania Sottile
Edit by Pomona Pictures