how come some of us are left handed and others right handed

Question: how come some of us are left handed and others right handed
- Keywords:
  hand,
  handedness,
  human body
Asked by AMY to Andy, Dwaine, Natt, Priya, Tatiana on 17 Jun 2015.
- Tatiana Trantidou answered on 17 Jun 2015:
  
  Hi Amy,
  
  scientists have found a specific gene in our DNA that determines if we are right or left-handed before we are born. For example, let’s say that the father is left-handed and the mother is right-handed. Then if these parents have 6 children, one of them will probably be left-handed. Now, if both parents are left-handed, then it is more likely to have a left-handed child (let’s say if they have 4 children, one of them will probably be left-handed).

Question: how come some of us are left handed and others right handed