Why would my grand mothers smoking history have any impact on me?

August 17, 2019 adhd-drbarr
  • smoking during pregnancy turns genes on and off that affect not only the offspring but are then inherited by their kids

We used to think genes were written in stone – immutable, unchanging – you either have the gene for freckles or you don’t a trouvé.

In the last ten years, we have discovered Epigenetics. Turns out genes can be turned on and off by environmental conditions. Then the turn-on can be inherited for a few generations before reverting back to off.

Turns out smoking in pregnancy predisposes to ADHD, not only in the offspring but through modifying gene expression, is then passed onto the next generation. It eventually fades out as genes reset, but it can take three generations to do so. Pretty scary stuff.

Category: Inheritance