Why do we use one hand more than the other?
Why do we use one hand more than the other? (Thinkstock)
Why do we use one hand more than the other?
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You asked us, why do we use one hand more than the other?

By the age of 2 or 3, most of us have started to prefer using one hand, and it is typically the right.

Only about 10 percent of us end up as lefties. If you are a lefty, you've probably been called a southpaw. They are basically all of the evil, witchy, criminal-type people out there. Just kidding! I'm just trying to mess with you, because we don't believe in that crazy talk anymore.

But why do we develop into righties and lefties? That question has more than a few scientists scratching their heads - with their dominant hand of course. (It's going to get worse.)

Handedness in humans probably goes way back, maybe as far as our Neanderthal ancestors or even earlier. Some researchers suggest the trait evolved as our tools became more sophisticated. 
 
But why the right hand came to dominate the left is anybody's guess. We do know that genetics plays a role in handedness. It's possible hundreds of genes are involved.
But, a person's environment is important, too. Just ask your grandma. In the past, lefties often had to learn how to write with their favored hand tied behind their back.
 
And even today, we basically live in a right-handed world, which forces many a lefty's hand when it comes to using scissors, writing at a desk or even zipping up a jacket. 
 
Until, that is, you get a lefty into the boxing ring or at home plate. That's when an element of surprise gives them the upper hand.

Source URL: https://www.tweentribune.com/article/tween56/why-do-we-use-one-hand-more-other/

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CRITICAL THINKING QUESTION
Why are some people left-handed?
Write your answers in the comments section below


COMMENTS (286)
  • kevinb-1-bar
    4/28/2016 - 10:40 p.m.

    Some people can be left handed Because that is how they learned to write. Some people learn to write with their left hand and some with their right, but it all depends on how they learn to write. Apparently scientists don't know the exact reason on why people write with their left hand so they are still trying to figure it out. It says in the text, "But why do we develop into righties and lefties? That question has more than a few scientists scratching their heads - with their dominant hand of course. (It's going to get worse.)" The text is saying that scientists don't know the main reason on why people write with their left hand. What I thought about this article was that I didn't like it because it did not have enough information.

  • jilliand-3-bar
    4/28/2016 - 10:53 p.m.

    Some people are left handed because their family is left handed. In the text it says " We do know that genetics plays a role in handedness. It's possible hundreds of genes are involved." So if one of your parents or grandparents is left-handed, you are more likely to be left-handed. But the environment you are in also affects which hand is your dominant hand. Overall, I thought this article was interesting because I did not know that genes play a roll in which hand is your dominant hand.

  • taylorp-1-bar
    4/28/2016 - 10:59 p.m.

    Some people are left-handed because of genetics. On paragraph 6, it says, "It's possible hundreds of genetics are involved." I enjoyed this article because I never really thought about why some people are left-handed and why most people are right-handed.

  • lucasddd-3-bar
    4/28/2016 - 11:04 p.m.

    Some people are left handed because they get it from relatives or it becomes their dominant hand.
    This article was interesting, and like most people I'm a right handed person

  • caymanm-2-bar
    4/28/2016 - 11:15 p.m.

    Some people are left handed because of genes. Also, environments could play a role in which hand is dominant. The article says "It's possible hundreds of genes are involved." Only 10 percent of the world is left hand dominate. This gives lefty's many disadvantages but some advantages. I thought this article was interesting because I thought that about half of the world was left hand dominate.

  • katherinec-3-bar
    4/28/2016 - 11:23 p.m.

    it is more common for people to be right handed. In fact it is pretty rare when you are left handed. I think I might only have one leftie in my classes. On paragraph 5 it says that," Some researchers suggest the trait evolved as our tools became more sophisticated." Lefties leave most researches scratching their heads. I found this interesting because I was curious why people are lefties.

  • caleighm-4-bar
    4/28/2016 - 11:26 p.m.

    Some people are left-handed because their genetics are different. It is possible that hundreds of genes affect which hand is dominant. Some researchers also suggest that " [...] the trait evolved as our tools became more sophisticated." (paragraph 5). I chose this article because I was curious about why we have one hand that does everything, and another that can't even pick up a spoon.

  • briannt-3-bar
    4/28/2016 - 11:28 p.m.

    Some people are left handed because they might have used that hand to write with when they started to write. Same goes with the people who write with their right hand. I chose this article because that was an interesting question and I wanted to know.

  • seans-2-bar
    4/28/2016 - 11:36 p.m.

    (Resounding applause) Finally, a sophisticated question that deals with the topic. Why don't I see this more often. Well, as is stated in the article " By the age of 2 or 3, most of us have started to prefer using one hand, and it is typically the right". It may have to do with genetics or with what hand your parents teach you to us in your early age. As is also stated in the article scientists are still scratching their heads about it.

  • lukep-6-bar
    4/28/2016 - 11:47 p.m.

    The question of why we develop into righties and lefties leaves many scientists very puzzled. About ten percent of people are lefties. Lefties may develop because genetics, a person's environment is important, too. But why the right hand came to dominate the left is anybody's guess.

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