Heleentje (heleentje) wrote in little_details,

Handedness in clones

Terms searched: handedness, handedness clones, dominant hands monozygotic twins, twins left-handed right-handed, rat clones handedness

The source material I'm working with has two characters, whom I'll call A and B. B is a clone of A, but whereas A is right-handed, B is left-handed. The source material mostly uses this as visual shorthand to show that B and some other characters are clones (and in one case, a robot version) of A and his friends, but because I'm curious as to whether the change in dominant hands would be possible (and because I'm not entirely comfortable with the implications) I started looking into the matter.

I've read that about 20% of monozygotic twins are born with different dominant hands, but that seems to do with conditions in utero, so I'm not sure how relevant that is. A friend of mine remembered about rats who were clones of the same individual, but had different dominant paws. Unfortunately, I can't seem to find and info on that. 

So basically, my question is whether it's possible for clones to have a different dominant hand than the individual they were originally cloned from, and if it's possible, how plausible that would be. Also, are there any factors that would affect handedness in this case? (For the record, A and friends would have little reason to manipulate the handedness of their cloned versions.) 
Tags: ~science: biology: genetics

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