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, often known as southpaws. 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 we develop into righties and lefties is a question that 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, although 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. That 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/tween78/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 (42)
  • lilyg-2-bar
    5/02/2016 - 08:22 p.m.

    Some people are left-handed because they grew up teaching themselves to use that specific hand. "By the age of 2 or 3, most of us have started to prefer using one hand" This is interesting because so many more people prefer the right hand over the left hand.

  • tiffanyf-1-bar
    5/02/2016 - 08:44 p.m.

    Some people are left-handed because of certain genes that cause some children to born with an instinct to use their left hand more often than their right. Genes are passed through generations from parents to their kids and so on. A child with left handed parents is more likely to be left-handed then a child with right-handed parents. The article states,"...why the right hand came to dominate the left is anybody's guess, although we do know that genetics plays a role in handedness. It's possible hundreds of genes are involved." It is likely that environment affects whether or not people are born left-handed but genes are definitely the main reason. This article is interesting because I have always wondered why some people were born right-handed and why other were born left-handed.

  • mayaw-6-bar
    5/02/2016 - 10:11 p.m.

    Some people are left-handed because of genetics and the environment they grew up in. Some people are left-handed because of genetics. In paragraph 5, it states that, "It's possible hundreds of genes are involved." Some people are left-handed because of the environment they grew up in. In paragraph 7, it states that, "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." Therefore some people are left handed because of genetics, and others are left handed because of the environment they grew up in. I liked this article because I learned something new. I chose this article because I thought I knew the answer to the title of the article, and I was partially correct.

  • katherinep-6-bar
    5/03/2016 - 08:05 p.m.

    Some people are left handed because of genetics or DNA. Some people however were born left handed but their parents forced them t be right handed. I am a left handed person but nobody in my family is. Even though people think it is genetics sometimes it is not and you are just born with it. To this day the right and left handed situation is still a mystery to scientist.

  • dashiellg-3-bar
    5/04/2016 - 05:45 p.m.

    By the age of two or three people typically choose whether to be left handed or right handed. Most people are right handed. Only ten percent of people are left handed. Some became left handed by tying their right hand behind their back. Some had it genetically. I thought this article was interesting because I knew that righty's dominated lefty's, but I did not know that only ten percent of the population was left handed.

  • alexanderc-6-bar
    5/04/2016 - 09:56 p.m.

    Some people are left-handed, because people in the past have had to force themselves doing their daily activities left-handed. By doing your activities left-handed, it will force you to remember the repetition and movement you use, and cause your brain to remember to use your left hand. I found this article very interesting, because I never knew that people years before were forced to use their left hands instead of their right hand.

  • coryk-1-nic
    5/05/2016 - 12:48 p.m.

    Some people write with there left hand. This is because genetics. That is why.

  • jaylynnj-Orv
    5/05/2016 - 01:18 p.m.

    It doesn't quite make sense why we would choose how to only use one hand rather than use both. Especially in sports, having a dominate hand just makes your other weaker.

  • lucasl-3-bar
    5/06/2016 - 12:54 a.m.

    Some people are left-handed because, as the article states, they are developed by their genes. Lefties and righties likely have many different genes that affect which hand is dominant. It is an interesting phenomenon, and like us, other animals develop a dominant limb or side, such as elephants with their tusks or dogs with their paws. As a result of our extensive use of tools and weapons, the characteristic has become an easily visible and relevant part of one's traits.

  • matthewp-6-bar
    5/06/2016 - 10:50 a.m.

    Some people are left handed because of genetics. Also some people when they are young are forced to use one hand more than the other so that hand becomes dominant. This is shown in the article by," We do know that genetics played a role." My opinion about this article is that I never knew why I was dominant with one hand and this article told me.

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