Each person's genes are unique in the world, and even identical twins can have certain genes that are different.

Therefore, each person has his or her own characteristics, and some characteristics are more conspicuous in the crowd, which will bring a certain degree of attention.

Some characteristics are looked at differently because of some prejudices.

Both common and rare traits are expressions of genetic diversity, and we should not consider them as anything other than what they are.

Let's take a look at what genetic traits are present in humans.

Windows to the Heart

What are the colors of human eyes, very can many people will say brown, brown, which is the vast majority of people's color, even white people are not everyone is blue eyes, most or this color number.

Second only to these two colors should be blue, we often say that the blonde in the "blue eyes".

But did you know? There are green eyes, amber eyes, gray eyes and even purple eyes, these are not only in the cartoon, but real.

The color of the glasses is actually the color of the iris, and the human iris has pigments distributed on it, the more pigments the darker the color.

The amount of this pigment content is determined by genes. In some ethnic groups, the gene that controls the synthesis of pigment is mutated, resulting in a decrease in pigment, so the color of the eyes appears to fade.

The iris colors other than brown and tan are the result of fading, and fading to the extreme will appear as gray eyes.

Almost all species in the primate family are tan, so this color is thought to be the initial color of the human iris, and the various colors that have emerged since are genetic mutations based on this.

About 90% of the world's population has primary colored eyes, 8% have blue, and the remaining 2% have other colors.

Eye color also has a certain relationship with the region, for example, the same are European whites, the Mediterranean white eyes are mostly hazel, but the further north you go, the lighter the eye color becomes.

Especially the Nordics and Slavs, many of whom have blue eyes.

Look at your feet

Is your foot thumb longer than the second toe? Some would say it's not of course, the thumbs are longer than the second one.

This is not necessarily the case, people and human feet are not the same, as early as 2000 years ago, the ancient Greeks found that the human foot will show three foot shape.

The Greeks themselves have feet in which the second toe is longer than the thumb, so they call this foot type the Greek foot.

Next door to them, in Rome, the feet looked different again. Most Romans had thumbs as long as their second toe, and the front of their feet looked flat.

On the other side, in Egypt, their feet are what we traditionally call longer thumbs, with all other toes shorter than it.

If you look closely at the Greek statues, many goddesses have Greek feet, so the Greeks considered the woman with this foot to be the beautiful one.

This aesthetic influenced the European region, so much so that the Statue of Liberty given by France to the United States also has Greek feet.

But in the East, Greek feet are considered an ominous sign, because many people in the East have Egyptian feet, and Greek feet look out of place instead.

In fact, whether it is Greek feet, Roman feet or Egyptian feet, or other more rare foot type, will not bring any bad luck, since the gene can be passed down, indicating that it is not affect people's lives.

Magical teeth

Do you have wisdom teeth? Have you ever been tormented by wisdom teeth and then went to the hospital to have them extracted?

Some people are curious as to why they need new teeth when they are already adults. Why didn't you finish growing your wisdom teeth when you were a child?

In fact, not everyone has wisdom teeth, and not everyone who has wisdom teeth will grow full, according to statistics, 35% of people will not grow wisdom teeth.

Actually long

Wisdom teeth are grown to share the pressure of other teeth so that they don't wear through.

Because early humans ate coarsely, many people's teeth were already badly worn by the time they reached adulthood, and those who did not grow wisdom teeth would be eliminated in adulthood.

As humans eat more and more finely, many people who do not have wisdom teeth are able to live peacefully into old age, so its offspring will also not have wisdom teeth.

In addition to wisdom teeth, there is another dental characteristic of human beings, an incisor with a gap, commonly known as "missing a door", because some gaps are about the same width as a tooth, but the vast majority of gaps are narrower than a tooth.

This feature is disliked by many people, so much so that many people come to dental hospitals for fillings, but it accounts for a pretty large percentage of the population, about 20%.

The reason is that this opening is the human evolution to increase the sharpness of the teeth, in order to facilitate the tearing of meat.

So this feature was a symbol of being able to eat meat in ancient times, and naturally it has been able to be passed down.

However, nowadays, the pursuit is for a straight mouth, so there are many openings to be filled and corrected, and gradually it is not common in the population.

However, the tooth can be filled, but the gene will not change, and it will remain in the population.

Teeth are about what we eat and drink, and if you feel it is interfering with your normal life, then you can have it modified.

But there is no need to laugh at those whose teeth are not like ours. In addition to being genetically controlled, teeth are also related to early habits during the growth process.

Even, some external forces can change the tooth structure, unknown to others, do not feel free to talk about others.

Left and right hand start

There are left-handed people, right-handed people, and people who can use both their right and left hands dexterously, and they can write at the same time.

Which hand we are accustomed to use is controlled by the half-brain, but the corresponding half-brains of the left and right hands are crossed, with the left half-brain controlling the right hand and the right half-brain controlling the left hand.

Which half-brain is more hairy to, then the person will be accustomed to the hand it controls.

Half-brain development is again related to genes, so the key to deciding left and right handedness is still genetic.

Some people are genetically predisposed to have a more developed right half of their brain, so their dominant hand is left-handed, and we call them left-handed.

However, there are also people with balanced development of the two halves of the brain, which allows them to use their left and right hands evenly, and these people account for less than 1% of all humans.

The argument about whether the use of the right and left hands is related to IQ has been made in the past, but according to medical research, there is no relationship between the use of the right and left hands and IQ.

The so-called left-handed out of scientists, but also because of survivor bias, such as Einstein was left-handed, so many people think that left-handed people will be more intelligent.

This is actually a prejudice that does not properly view left-handed people, seeing them in a small way, thinking that they always have something different.

In fact, the use of the right and left hand is the same as the human height, fat and thin, is just an expression of genetic characteristics.

Other parents do not want their children to be left-handed and forcefully correct them, which results in misperceptions.

This correction does not really make much sense because it can change the surface but not the genes, and in the end, you will still be genetically driven to use your left hand.

The child gained nothing except a bunch of pain.

Respect for individual differences

Some people love tomatoes, some people love eggs, some people love scrambled eggs with tomatoes, we all have our own preferences, we all have certain characteristics.

When you see that others are different from yourself, you can be surprised, you can be curious, and you can even show doubt, but you should not attack or discriminate against others because of this difference.

These rare genetic traits are not necessary to care too much if they do not bring health effects.

Everyone's genes are different, and forcing everyone to be the same is obviously not realistic.

After the rise of the Internet, more and more genetic traits were known to everyone, and with them came all kinds of big issues, which then caused wild discussions among netizens.

There are even more, using this special to make profit and end up harming a group of people.

The fact that rare genetic traits can be so exploited is still due to the existence of prejudice and superiority, with many people taking pleasure in bashing others for being different.

If people could do the usual thing of looking at the different characteristics of genes, then this phenomenon would not exist.