Obsession With Weather Forecast..
Jokes2 mins ago
No best answer has yet been selected by janelle_ire. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.Actually left or right handedness isnt really determined until about four years of age. The child may start to prefer a certain hand earlier, but when they begin to write and color proficiently is when they actually "pick" a hand. I think it has to do with genetics as well, but the hand that we consider ourselves as- is usually stronger and able to do more complicated tasks. So what happens is that one just "takes over" as the dominant hand. We also have a dominant eye as well, and its not always the same as which hand we use. I guess we have a dominant hand because otherwise they both would reach out to do something, this way the skills are more refined in usually one hand- for things like writing.
Sorry I dont have a biological answer, but this is stuff I have heard the past few years while I was in college.