Why some people are lefty while others righty? Is it controlled by genes?
Some use their right hand more and are righty and others are lefty??
Is it hereditary and controlled by genes?
Possible. Everyone has a dominated side. The left hemisphere of your brain controls the right side of your body and vice versa. Euer heard the phrase "left handed, right minded"? I'm left-handed, my mother's left-handed, her mother is a lefty too, but her mother (my great grandmother) was a righty, but her mother (my great great grandmother) was a lefty. So that's first generation: lefty, second: right, third: left, forth: left, and fifth: left. But my aunt's (right handed) sister-in-law is right handed with a right handed mother and a left handed daughter.