>>7867984>How come they haven't died or been bred out of humanity?Being left handed gives you little or no extra odds of deat so the genes just stay in the gene pool and are just as likely to be passed on to the next generation as right handedness.
>why are most people right-handed?because, if you remember your high school genetics lessons, the right handed gene is dominant so if we represent the right hand gene as H and the lefthand gene as h you get the following outcomes when two carriers of the left hand gene and righthand gene have kids:
Hh x Hh => HH, Hh, hH, hh
In all but one of those possibilities they will result in right handed children.
When a left gene carrier has children with a pure right this happens:
Hh x HH => HH, Hh
There's no chance of left handed off spring but 50% of their children secretly carry the gene.
So Lefthandedness doesn't get bread out of the gene pool but it shows up less as a phenotype as it is a recessive gene.
