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What are the advantages and disadvantages of being ambidextrous?


Most of us have one dominant hand. We find it nigh on impossible to do very delicate or dextrous activities with our other-hand. This seems like an apparent weakness, and a rather odd one when you first think about it.

Cursory internet searches revealed unexpected findings. One website said it has mostly negative effects on the brain. However I don't trust the source at all.

I'd be interested to know about the "story" about the good and bad of ambidextrous physiology. Particularly, I am interested in the neuroscience of ambidextrous people.


I think that the advantages of using both hands with equal ease is quite evident whether it be sports, at your work or while you are doing your household chores.

An obvious advantage is using both hands to write or draw with both at the same time.

I would be focusing on the disadvantages that may be faced.

1) Ambidextrous people are more prone to suffer from Synaesthesia (reference)

2) They are likely to possess (not necessarily) the LRRTM1 gene which is linked with Schizophrenia (reference).

3) They score lesser in intelligence testing (reference).

4) Mixed handed children are more likely to suffer from ADHD (reference).

5) Mixed handedness is associated with greater age-related decline (reference)

6) They are easier to anger and influence emotionally (reference).

There are quite a few studies that have pointed out that it may not be all that good a condition but Leonardo da Vinci who was probably the most diversely talented man who ever lived is said to have been ambidextrous. He apparently could draw with one hand and write with the other at the same time, so I would have to say that the positives of the condition are extremely good (reference).

edit:

This probably qualifies as a second question :-D but I just saw a thought by biogirl in the comments section on "whether our ancestors used both the hands and using just one hand is recently evolved" and she has a point there. From a study publlished in 1977 I quote.

The predominance of the right hand over the left was also reported among Egyptian art forms 3,500 to 4,500 years old, where the ratio of left- to right-handers was 9:111 and 5:100, respectively. However, going further back using the "Draw-a-Man Test," found that ancient paleolithic man, from 1,750,000 to 8,000 years B.C., was probably either more ambidextrous or that there was a greater proportion of left-handers than there are now. (reference)

Also from a study titled "Evolutionary Back Grounds of Human Left Handedness", the authors concluded that

For most manual tasks, especially those tasks involved in competitive activities, increasing performance by the specialization of one hand is certainly adaptive. Aggressive interactions are responsible for fundamental selection pressures acting during primate and human evolution. The higher prevalence of right-handedness might well be due to a previously existing cerebral bias. But the specialization of one forelimb leading to right or left-handedness is better viewed as the result of natural selection. (reference)


  • The variation that sexual reproduction creates among offspring is very important to the survival and reproduction of the population.
  • In sexual reproduction, different mutations are continually reshuffled from one generation to the next when different parents combine their unique genomes this results in an increase of genetic diversity.
  • On average, a sexually-reproducing population will leave more offspring than an otherwise similar asexually-reproducing population.
  • sexual reproduction: Sexual reproduction is the creation of a new organism by combining the genetic material of two organisms. There are two main processes during sexual reproduction: meiosis, involving the halving of the number of chromosomes, and fertilization, involving the fusion of two gametes and the restoration of the original number of chromosomes.
  • asexual reproduction: any form of reproduction that involves neither meiosis nor fusion of gametes

1. They are more likely to pass a driving test

Did you know that left-handers have higher success rates on driving tests than their right-handed brothers and sisters? Statistics show that 57% of left-handers pass their driving test first time round, while the right-handers only come in at 47%! Some of the best drivers in the world are left-handed such as Ayrton Senna and Valentino Rossi. If someone ever comments on your driving, there&rsquos no harm in pointing this out!


11 Advantages And Disadvantages Of Sexual Reproduction

Sexual reproduction occurs when living organisms combine genetic information from two different types. These types are referred to as “sexes.” For most high-level organism, this occurs between two genders. The male gender produces a mobile gamete which travels to fuse with a stationary gamete that is produced by the female gender.

Gametes are germ cells that are able to unit with germ cells from the opposite gender. Some may refer to them as “sex cells” or “reproductive cells.” For humans, the male gamete would be sperm cells and the female gamete would be egg cells.

The primary advantage of sexual reproduction is that it encourages the survival of a species. Whether discussing people, plants, or animals, mates are attracted to one another based on a hormonal perception of superiority. There is a natural desire to mate with someone from the opposite gender with heterosexual attraction so that the best possible traits can be passed along to the future offspring.

The disadvantage of sexual reproduction is that outside influences can determine the viability of the offspring. In humans, for example, a failure for a mother to consume an adequate amount of folic acid is directly linked to neural tube birth defects. This defect occurs at the earliest stages of development, often when a woman doesn’t know she is pregnant, which means the folic acid must be consumed when attempting to conceive. About 3,000 children in the US are born with neural tube defects in the United States every year.

Here are some additional advantages and disadvantages of sexual reproduction to consider as well.

List of the Advantages of Sexual Reproduction

1. It creates genetic diversity within a species.
In asexual reproduction, a direct copy, a clone, is produced. This allows for reproduction to occur without a mate, but it also increases the chances of a mutation developing within the species. Should the wrong mutation occur, the entire species could eventually be wiped out.

Sexual reproduction prevents this issue from occurring because the genetic materials from two parents, not one, are used to produce an offspring. That prevents genetic bottlenecks from occurring.

2. There is a natural level of disease resistance throughout the species.
A greater level of genetic diversity allows for higher levels of natural disease resistance within a species. That is because the bacteria, parasites, and viruses which may affect the health of a species are unable to adapt to one specific genetic profile. There will always be disease, but genome diversity allows for the immune systems of people, plants, and animals to fight off the intrusions so a healthy life can be maintained.

3. Genetic variation can lead to evolutionary advancements.
Genetic variation incorporates a process that is similar to the “survival of the fittest” principles that Charles Darwin first introduced. Darwin suggested that the animals of a species that are best suited to their environment are the most likely to survive. Through sexual reproduction, those survivors pass on their traits to their offspring, which allows the species to begin to evolve on micro-levels, and potentially on macro-levels as well.

Even if evolution does not occur, sexual reproduction does offer the chance to screen out undesirable traits or genetics from a species. Many tests are available to determine the genetic status of people, plants, and animals. By identifying high-risk individuals and restricting their access to breeding, it is possible to eliminate certain poor genetic profiles.

These restrictions are not generally imposed on humans, but can be seen in other species, such as horses.

4. It is a rewarding experience.
Sexual reproduction makes those experiencing it feel good. It stimulates the pleasure centers of the brain so that more is wanted. This happens because sexual reproduction, especially in humans, releases dopamine. It can even be addictive, much like cocaine, because of how it affects the brain. It can act like a drug in more than one way.

Sexual reproduction can act as an antidepressant. The process of sexual reproduction can help to relieve pain. Vigorous sexual reproduction can even lead to temporary amnesia, but it can also improve personal memory.

In many ways, sexual reproduction is designed to be a rewarding experience. That encourages reproduction to occur so that the cycle of life can continue.

5. It can encourage the growth of brain cells.
In asexual reproduction, a parent essentially clones itself to create an offspring. Both are individuals, but copies of one another. In sexual reproduction, a 2010 finding by Princeton scientists discovered that sexually active creatures experience brain growth compared to creatures that are not sexually active.

Sexual activity increases the production of brain cells within the hippocampus. This is the area of the brain that manages memory. Larger cells and more connections form with a greater frequency of mating.

6. It improves health.
In humans, practicing sexual reproduction is directly linked to better health. Men who have sex 1-2 times per week, for example, have a lower risk of developing heart disease compared to men who have sex 1-2 times per month or less. At the same time, sexual activity can lower blood pressure and reduce the influence of cortisol, a stress hormone, on the body.

Sexual activity can also promote a stronger immune system, stronger muscles, and may even lower certain cancer risks.
One unique benefit of sexual reproduction is that it increases levels of oxytocin, which is often called the “love hormone.” Sexual activity increases the generosity people have when they are emotionally engaged with a mate.

List of the Disadvantages of Sexual Reproduction.

1. It takes time and energy to find a mate and reproduce.
In sexual reproduction, the two genders must find each other to be able to reproduce. It takes time and energy to locate a suitable mate with the preferred traits that are desired so that the offspring produced by the union can thrive. For some species, the process of mating is an all-encompassing task that requires a sole focus on the reproductive cycle until it is completed.

2. Reproduction through sexual means is uncertain.
Sexual reproduction is not a 100% successful method of creating offspring. Some chosen mates may be infertile. Others may not have the gametes come together, despite numerous attempts at creating offspring. Although there are diversity advantages that come through this method of reproduction, it is an uncertain method.

If population numbers are low for a species, it is possible for it to become extinct despite efforts at sexual reproduction because a zygote is unable to form.

3. Favorable genetics might not be passed to the offspring.
The offspring of two parents receives a combination of their genetics. Inheritance patterns are common with sexual reproduction. Patterns include autosomal dominant and recessive, x-linked dominant and recessive, and mitochondrial.

Autosomal dominant patterns occur in every generation and each affected offspring usually has an affected parent. Autosomal recessive patterns require both parents of an offspring to be affected. Huntington’s disease is an autosomal dominant disease and sickle cell anemia is an autosomal recessive disease.

In x-lined dominant diseases, female offspring are more likely to be affected than male offspring. The opposite is true for x-linked recessive diseases.

For mitochondrial inheritance, both males and females are effected, but mothers pass the traits onto their children.

4. Fewer offspring are typically produced.
Sexual reproduction can produce numerous offspring at one time. Humans may typically have one child through reproduction, but twins, triplets, and larger multiples are possible. Horses may typically have one foal, but cats and dogs may have more than a dozen in a litter. Compared to asexual reproduction, however, there are usually fewer offspring produced over time. With asexual reproduction, whenever an offspring is required, it can be produced. The same is not always true by using sexual reproduction.

5. It can be deadly.
Achieving an orgasm is the goal of sexual reproduction, but success sometimes comes with a price. Up to 5% of the human population has a brain aneurysm and the process of sexual reproduction can cause the aneurysm to rupture. There are 8 common triggers that cause a rupture and mating is one of them. That is because the process of sexual reproduction creates an increase in blood pressure.

About half of the people who experience a ruptured aneurysm will die from the bleeding that occurs within their brain. 1 in 4 people who survive will be left with a permanent disability.

Similar traits can be found in various animal species as well.

Sexual reproduction has many advantages and disadvantages to consider from a scientific standpoint. Genetic diversity can be created, but the process is uncertain and somewhat unpredictable. When practiced regularly, it can improve brain power, help to fight off disease, and make those practicing it feel good. There may be health risks involved, but for most species, the reward of sex outweighs its potential disadvantages.


4 Advantages and Disadvantages of DNA Mutating

There are several reasons why the DNA mutate, which is the change that occurs in the DNA sequence. Sometimes it can be caused by mistakes when copying the DNA or when affected by several factors including cigarette smoking and ultraviolet light.

In a lifetime, there are changes that occur in the DNA which include mutations in the sequence of bases. This will result in the change of proteins being made which can sometimes be a positive or a negative development. During replication of the DNA, mutations can occur when errors made are not corrected right away. Exposure to pollutants in the environment such as smoke, radiation, and sunlight can also cause mutations.

However, DNA mutating can have positive or negative impact in human life. So, this can either be essential or it can disrupt the normal gene activity which is responsible for causing diseases. In order to understand more about this term, here is a collection of advantages and disadvantages of DNA mutating.

List of Advantages of DNA Mutating

1. Essential for Survival
The process of mutating has allowed humans to adapt to different environments. Tolerance to lactose, for example, is a particular external mutation advantageous in societies raising cows and goats. Basically, mutations can happen as antibiotic resistance of a bacteria, sickle cell resistance against malaria, and immunity of a person against HIV, just to name a few.

Likewise, there are mutations that caused the shortness of height which has proven to be useful in Ecuadorian communities. This is known as the Laron syndrome which enables them to be immune to diabetes and cancer.

2. Creates Diversity or Uniqueness
A switch in the chromosomes responsible for the inability of producing brown eyes has also been attributed to genetic mutation that has affected the OCA2 gene. For instance, occurrences like hair color, freckles, beauty spots, and baldness are just a few consequences of mutation.

List of Disadvantages of DNA Mutating

1. Cause of Some Diseases
As there are positive effects of mutation, there are also negative ones which caused diseases. This was explained in a related news in 2008 that one particular mutation that was common to the Indian subcontinent that has predisposed citizens to heart disease. At the same time, there are other diseases that are linked to genetic mutation, which include diabetes, cancer, and asthma.

2. Genetic Disorder
Genetic disorders are diseases that are caused by the abnormality in the DNA of certain individuals. Some of these abnormalities could range from a tiny mutation in a gene to either the addition or subtraction of a whole chromosome or sets of chromosomes. One mutation type that is most common is the non-disjunction disorder. An example of such a disorder is Down syndrome, which is a genetic disorder that is common and should be responsible for developmental delays.

Mutation is a fact of life and it is one of the most amazing mysteries that nature can provide. It is in fact responsible for the diversity of life on the planet, including the existence of man. Nevertheless, not all mutations offer positive impact.


Scanning Electron Microscope

A Scanning Electron Microscope (SEM) is a powerful magnification tool that utilizes focused beams of electrons to obtain information.

The high-resolution, three-dimensional images produced by SEMs provide topographical, morphological and compositional information makes them invaluable in a variety of science and industry applications.

To the right is a picture of
a pollen grain viewed under a SEM.

SEM Properties

The Scanning Electron Microscope developed by professor Dr. Charles Oatlev with the assistance of graduate students in the 1950s, are one of the three types of electron microscopes (EM).

Electron microscopes utilize the same basic principles as light microscopes , but focus beams of energetic electrons rather than photons, to magnify an object.

SEMs consist of the following components:

  • Electron Source
  • Thermionic Gun
  • Field Emission Gun
  • Electromagnetic and/or Electrostatic Lenses
  • Vacuum chamber
  • Sample chamber and stage
  • Computer
  • Detectors (one or more)
  • Secondary Electron Detector (SED)
  • Backscatter Detector
  • Diffracted Backscatter Detector (EBSD)
  • X-ray Detector (EDS)

In addition, SEMs require a stable power supply, vacuum and cooling system, vibration-free space and need to be housed in an area that isolates the instrument from ambient magnetic and electric fields.

SEM Imaging

A Scanning Electron Microscope provides details surface information by tracing a sample in a raster pattern with an electron beam.

The process begins with an electron gun generating a beam of energetic electrons down the column and onto a series of electromagnetic lenses.

These lenses are tubes, wrapped in coil and referred to as solenoids.

The coils are adjusted to focus the incident electron beam onto the sample these adjustments cause fluctuations in the voltage, increasing/decreasing the speed in which the electrons come in contact with the specimen surface.

Controlled via computer, the SEM operator can adjust the beam to control magnification as well as determine the surface area to be scanned.

The beam is focused onto the stage, where a solid sample is placed. Most samples require some preparation before being placed in the vacuum chamber.

Of the variety of different preparation processes, the two most commonly used prior to SEM analysis are sputter coating for non-conductive samples and dehydration of most biological specimens.

In addition, all samples need to be able to handle the low pressure inside the vacuum chamber.

The interaction between the incident electrons and the surface of the sample is determined by the acceleration rate of incident electrons, which carry significant amounts of kinetic energy before focused onto the sample.

When the incident electrons come in contact with the sample, energetic electrons are released from the surface of the sample. The scatter patterns made by the interaction yields information on size, shape, texture and composition of the sample.

A variety of detectors are used to attract different types of scattered electrons, including secondary and backscattered electrons as well as x-rays.

Backscatter electrons are incidental electrons reflected backwards images provide composition data related to element and compound detection. Although topographic information can be obtained using a backscatter detector, it is not as accurate as an SED.

Diffracted backscatter electrons determine crystalline structures as well as the orientation of minerals and micro-fabrics.

X-rays, emitted from beneath the sample surface, can provide element and mineral information.

SEM produces black and white, three-dimensional images.

Image magnification can be up to 10 nanometers and, although it is not as powerful as its TEM counterpart, the intense interactions that take place on the surface of the specimen provide a greater depth of view, higher-resolution and, ultimately, a more detailed surface picture.

SEM Applications

SEMs have a variety of applications in a number of scientific and industry-related fields, especially where characterizations of solid materials is beneficial.

In addition to topographical, morphological and compositional information, a Scanning Electron Microscope can detect and analyze surface fractures, provide information in microstructures, examine surface contaminations, reveal spatial variations in chemical compositions, provide qualitative chemical analyses and identify crystalline structures.

SEMs can be as essential research tool in fields such as life science, biology, gemology, medical and forensic science, metallurgy.

In addition, SEMs have practical industrial and technological applications such as semiconductor inspection, production line of miniscule products and assembly of microchips for computers.

SEM Advantages

Advantages of a Scanning Electron Microscope include its wide-array of applications, the detailed three-dimensional and topographical imaging and the versatile information garnered from different detectors.

SEMs are also easy to operate with the proper training and advances in computer technology and associated software make operation user-friendly.

This instrument works fast, often completing SEI, BSE and EDS analyses in less than five minutes. In addition, the technological advances in modern SEMs allow for the generation of data in digital form.

Although all samples must be prepared before placed in the vacuum chamber, most SEM samples require minimal preparation actions.

SEM Disadvantages

The disadvantages of a Scanning Electron Microscope start with the size and cost.

SEMs are expensive, large and must be housed in an area free of any possible electric, magnetic or vibration interference.

Maintenance involves keeping a steady voltage, currents to electromagnetic coils and circulation of cool water.

Special training is required to operate an SEM as well as prepare samples.

The preparation of samples can result in artifacts. The negative impact can be minimized with knowledgeable experience researchers being able to identify artifacts from actual data as well as preparation skill. There is no absolute way to eliminate or identify all potential artifacts.

In addition, SEMs are limited to solid, inorganic samples small enough to fit inside the vacuum chamber that can handle moderate vacuum pressure.

Finally, SEMs carry a small risk of radiation exposure associated with the electrons that scatter from beneath the sample surface.

The sample chamber is designed to prevent any electrical and magnetic interference, which should eliminate the chance of radiation escaping the chamber. Even though the risk is minimal, SEM operators and researchers are advised to observe safety precautions.

Hitachi's Scanning Electron Microscope

Hitachi High-Technologies, formed in 2001, manufactures a variety of science and technology related products.

Some Hitachi products include spectrophotometers, a variety of analyzers, inspection equipment, electronic devices, and semiconductor products as well as a line of microscopes.

They currently manufacture three scanning electron microscope models:

  • S-3700N, an analytical style SEM ideal for studying large, heavy and tall samples
  • S-3400N, a user-friendly, more compact model that utilizes new technology in electron optics
  • SU1510, a compact, high performance SEM that can handle large samples and provides high-resolution imaging

A Scanning Electron Microscope provides detailed surface data of solid samples.

SEMs take incidental electrons and focus them onto a specimen the electrons that scatter off the surface following this interaction can be analyzed with a variety of detectors that provide topographical, morphological and compositional information regarding the surface of a sample.

Although SEMs are large, expensive pieces of equipment, they remain popular among researchers due to their wide range of applications and capabilities, including the high-resolution, three-dimensional, detailed images they produce.

Transmission (TEM) - check out one of the most powerful microscopic tools available to-date, capable of producing high-resolution, detailed images 1 nanometer in size.

Cryo-Electron - is a type of transmission electron microscopy that allows for the specimen of interest to be viewed at cryogenic temperatures. Check it out.

Cryo- Electron Tomography - Resolution, Advantages and Advances

Virtual - provides a simulated microscope experience via a computer program or Internet website for both educational and industrial applications and are easily operated and accessible.

Take a look at how Electron Microscopy compares to Super-Resolution Microscopy.

Taking a look at Viruses under the Microscope and answering the question, what are viruses?


Disadvantages Of Vegetarianism :

Though the advantages of being a vegan is very obvious, there are also some or the other complications that needs to be addressed in order to obtain a clear picture of the mode of the foods that may be eaten. Some people shriek from the idea of the meat free diet. So there are some demerits/cons of vegetarianism also listed here.

1. Inadequate Amounts Of Protein :

  • The major concern that makes the people to abstain from becoming the vegetarians are the fear of not getting sufficient levels of protein.
  • But this is not so real as there are many foods that the vegetarians can eat to increase the level of the protein in the body.
  • This only needs a little exploration into the scientific facts of the nutrients that are in the foods.
  • The act of mere removal of the meat from the daily food regime does not help. The people need to go beyond that.
  • They have to make some healthy choices and explore new combination of the foods.
  • It is suggested to get some books from the library and educate oneself about the proper nutrients that are found in the foods.
  • The people must slowly transform from being non-vegetarians into vegetarians.

2. Limited Choices Of Foods :

  • The vegetarian foods seem to be limited.
  • This is not true as there are many ways and combinations of foods that the people can eat to get the full nutrients.
  • There is an endless list of the foods that can be eaten by the vegetarians. It can be done by adding a new food item every week.
  • This needs a constant shift from the non vegetarian life into a vegetarian life.
  • The novice beginners may not know where to start as they can be tricky.
  • But with the proper guidance and instructions this can be effectively brought to effect.

3. Challenges In Eating :

  • It becomes a real task when the vegetarian people go out to have their food.
  • Most of the foods in the restaurants target only the non vegetarian people.
  • This makes the vegetarian to become sly.
  • Some people do not wish to eat food that has been cooked in the same ovens that also cooks the meats.
  • Removing the meat from the dish does not help either.
  • The nuts, butter fruits and the other vegetables can be used as a substitute for the meat.
  • The best thing a vegetarian has to do is to bring the home cooked foods and eat them in the canteen and the dining hall in the corporate places.

4. Social Issues :

  • When it comes to parties and get together, the vegetarian people find it very hard to cope up with the other people.
  • This is because the other people may include a meat diet with no concern.
  • It may be foolish to inform the host about the food preferences of a particular person but it must be informed.
  • The organizer must be made known a week before in advance about the eating preferences of a person.
  • This makes them spare a lot of time.
  • It is also right to take along some food product along with one to a party so that they feel full.
  • Even if any of the fellow party makers question the food preferences, they must be politely answered.

5. Differences In Choices To Family And Friends :

  • Sometimes when the vegetarian people get to be served another dish other than the ones the family eat.
  • This is because they may, sometimes, eat meat foods.
  • The vegetarian may get to meet some people who have a difference of opinion that means to bring a strife.
  • So in order to avoid them the vegetarian must be ready with his answers and oblige them in a easy manner.
  • The vegetarian must explain why he has opted for the vegan mode of life in a thought provoking manner.
  • At the times of the certain festivals, it is difficult to abstain from meat which is a part of that festival.
  • It is also equally difficult to explain the same to the family.

6. Reading the Labels Every Time :

  • The vegans may go a step forward and abstain from even the leather products, soaps, fish oils etc.
  • They may have to read the labels of the foods and other stuffs they purchase from the market.
  • They easily can surf the internet and get to know about the various stuffs that have no amount of the meat products.

7. Learning To Cook On Their Own :

  • At all the places, the people can never be sure of being provided with a meat free diet.
  • It is also awkward to also expect so.
  • The people must learn to cook their favorite foods at home to avoid the scruples.
  • If they wish to add eggs, they may roast some vegetables and sprinkle some grains on them and eat the roasted eggs with a fruit at the side.
  • The cooking also is not so difficult.

8. Deficiencies :

  • The fact that the vegetarian choice does not contain enough nutrients is false.
  • There are some foods that are equal in the amounts of the nutrients that are found in the meat.
  • It is due to the improper selection of the foods on the part of the people that they suffer from certain deficiencies.
  • There are many deficiencies like the iron deficiency, calcium deficiency and vitamin deficiency etc.

9. Lifestyle Changes :

  • Often when the vegetarian people go to visit their friends, they have to make it clear that they have to eat only vegan foods.
  • This makes them to limit their food choices and also make them to run to the stores to get some stuffs for cooking.
  • Moreover the sweets, snacks and other junk foods are also free totally from the meat products as they are prepared with the help of the animal fats.
  • And at the restaurants, the choices to eat food will be limited very much.

Just as there are numerous sub-categories of biology, there are numerous job paths.

Share your wealth of knowledge as a biology instructor for a high school or college, or as a build up that wealth of knowledge as a researcher for a medical university. Use your biology background to apply for medical school to become a doctor or veterinarian. Or tap into your skills for a variety of other jobs, including:

  • Forensic scientist
  • Science technician
  • Plant scientist, or botanist
  • Aquatic or zoo biologist
  • Science museum curator or manager
  • Genetic engineer
  • Ecological economist
  • Political adviser for government groups or nonprofits
  • Science writer for a magazine, newspaper, website, or TV program

Lefty Advantage

Historically, left-handed people were more prone to picking up skills with their non-dominant (right) hand. Studies show that this training has tremendous benefits for left-handers and can even lead to success in other areas of life.

Many twentieth-century British and American educators, psychologists, and psychiatrists advocated forcing left-handed children to write with their right hands. These experts asserted that a child’s decision to rely on his or her left hand was a reflection of a defiant personality that could best be corrected by forcible switching. The methods used to retrain left-handers were often tortuous, including restraining a resistant child’s left hand. – https://www.ncbi.nlm.nih.gov/pubmed/22332811

The Catholic Church was an early adopter of this philosophy, as anything involving a “defiant personality” was deemed as needing quick correction. My grandfather was born left-handed but forced to switch to right-handed in the 1930s. By the 1980s, this practice was no longer employed in catholic schools, but there has long been a lingering expectation that left-handedness was problematic.

Personally, I can tell you that I played my first two seasons of little league baseball with a right-hander’s glove, due to lack of availability of quality gloves for lefties. Also being a lifelong soccer player, the training is mostly surrounding lower body and hip movements versus from the wrist out to the fingers. This served over the years as a huge advantage in some ways and minor disadvantage in others, but I was never confused about my dominant, or preferred, hand or foot.

If you have a genetic disposition to be a lefty—odds are that growing up in a right-handed world will make you more likely to think outside-the-box and become a leader. It’s ironic that for centuries teachers and schools would literally tie the left-hand behind a student’s back in an attempt to force pupils to be right-handed. Luckily, science is proving that allowing one’s biological handedness to flourish leads to success and leadership skills. – Psychology Today

Again this cross-handed training does have benefits, and many of the skills that Ben Simmons displays on a nightly basis are a direct result of his seemingly equal comfort in moving and dribbling left or right. When you watch Simmons finish at the rim, however, he almost exclusively finishes right-handed. One could argue that he finishes more often right-handed than a typical right-handed player would in situations on the left side of the rim. This was first publicly called out by Kevin O’Connor.

When it comes to jumpers or free throws, however, Simmons shoots with his left hand. This sort of cross-handedness could be an indication of a couple of things. One could be a confusion between his dominant eye (or Ocular Dominance) and his dominant hand (handedness).


Conclusion:

The HGP was aimed to have a better eye on the whole gene sequences existing in the whole human DNA or genome. Scientists believed that the successful conclusion of the whole human genome OR having an exact genome mind map can open certain ways towards making modern medicines for untreatable diseases in humans. Also, this project not only opened ways in medical technology but also poped new study fields in biology as bioinformatics which is now completely operational as a leading cutting edge technology in the biology market.


Watch the video: 25 BIZARRE Facts About Being Ambidextrous (January 2022).