Tuesday, April 1, 2008

handedness

My daughter is lefthanded. I just assumed that she was because her paternal Grandmother is. Alas, this is not so. Well, more accurately, it is not soley why. In Anatomy today we were discussing the brain and it's associated parts; part of the discussion was about how information crosses from one hand to the opposite side of the brain, as well as, the parts of the brain that control fine motor actions (like writing). All of this led me to ask the question: "Why are some left-handed and some, right?" Apparently it goes something like this...

We are all genetically prediposed to a handedness, either left or right; we are hardwired to use one side more easily and unconciously then the other. The left genetic dispostion is a recessive trait, meaning that both mom and dad have to possess the gene. As little J is left handed, that means that her daddy got it from his mommy and I got it from...? I'm guess Dad, as he tends to be rather ambidextrose.

So, how cool is that? Not only is she blond with blue eyes, but she's a lefty too! She really is special. Though, please, what ever you do, don't tell her that! She already likes herself plenty:)

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