my parent are right-handed too but my grandma is leftie. But it seems almost everybody else didn't have any leftie in the family that they're he's aware of. I f

my parent are right-handed too but my grandma is leftie. But it seems almost everybody else didn't have any leftie in the family that they're he's aware of. I find this odd, mostly because they says it's genetics so a lot of people cary left handed genes but it's hardly "primary"/"used" (I don't know the right word).