Genetic makeup that makes one person more responsive to weight training than another?

[LovingtoLift]

Anyone here know the science of the genetic makeup that makes one person's muscle's more responsive to weight training than a person who is not as responsive? Anyone here care to explain this to the board? Its an interesting topic so I hope someone can give an educated answer with terminology. Thank you.

 

[Rodja]

Allele expression of certain specific genes. This applies not only to lifting, but any type of athletics.