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Most fumbles, game: 10; Phil-Pitt “Steagles” vs. New York Giants, October 9, 1943; Detroit Lions vs.
Roger Staubach
Timmy Smith
In fact, one of the more unusual hypotheses to explain the rarity of left-handedness is that a genetic mutation in our distant past caused the language centres of the human brain to shift to the left hemisphere, effectively causing right-handedness to dominate, Alasdair Wilkins explains for io9 back in 2011.
On the flip side, lefties have some disadvantages too.
Lefties get angrier A study in The Journal of Nervous and Mental Disease suggested that those who are left-handed are more prone to negative emotions. It also found that when processing emotions, lefties have a greater imbalance in activity between the left and right brains.
Summary: Left-handedness is sometimes the expression of a genetic defect or an early developmental disturbance. Left-handedness is sometimes the expression of a genetic defect or an early developmental disturbance.
You’d be right-handed with either one or two copies of the right hand gene. To be left-handed, both copies would have to be the left hand gene. For example, if both parents are right-handed, there is a 1 in 10 chance of having a left-handed child. The same is true if the dad is left-handed.
Forcing them to change hands and write right-handed can have very bad effects in later life as well as being traumatic at the time and ruining their handwriting! Changing the hand used for writing causes great confusion in the brain and can have a lot of knock-on effects.