If your father was left-handed but your mother was right-handed, you have a 17% chance of being born left-handed, while two righties will have a left-handed child only 10% of the time.
Se o pai for canhoto e a mãe for destra, há uma hipótese de 17%  de se nascer canhoto. Se os dois pais forem destros, terão 10% de hipóteses de terem um filho canhoto.