Is it in our dna wether we are left handed or right handed?

Joined: February 25th, 2011, 7:27 pm

March 7th, 2016, 9:42 pm #1

What determines if we are left handed or right handed? It's it already decided before we are born?
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Joined: October 14th, 2010, 7:21 pm

March 8th, 2016, 4:59 am #2

A better question is whether poor spelling and horrible grammar is in our DNA.
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