4.6 billion years ago, the earth was born in a solar system on the edge of the Milky Way. At that time, no one would have thought that the earth could evolve into a very rare planet of life in the universe. Later, it evolved into a more rare intelligent civilization planet. Life can be said to be the most mysterious and complicated thing that has appeared since the Big Bang. It can reveal the mystery of life, or it can crack the ultimate mystery of the universe.
Life grows and changes through continuous evolutionary evolution, and it is in simple life that human beings emerge after a long period of evolutionary evolution. Therefore, human beings can be called advanced life, a form of life evolving to an advanced stage. Of course, there is no end to the evolution of life, and human beings are not the most advanced life in the universe. They will continue to evolve in the future.
The evolutionary evolution given to mankind by nature does not have a fixed direction choice, but is based on the changes of nature. Therefore, the evolution of life under nature is full of too many unknowns and uncertainties. It is difficult for scientists to give definite answers as to what humans will evolve in the future.
To unravel the mystery of human future evolution, we need to have a more detailed and comprehensive understanding of the DNA that makes up life. I believe many of my friends know these terms such as chromosome and DNA. They are actually the most important part of the human body, especially chromosomes, which are aggregates of genetic material in cells, which are composed of protein and DNA.
DNA is also called deoxyribonucleic acid, which is one of the four biological macromolecule nucleic acids contained in biological cells. DNA carries the genetic information necessary for the synthesis of RNA and protein, and is a biological macromolecule essential for the development and normal operation of organisms.
Through this information, we can see that the chromosomes are the decisive factor that determines the direction of the human body’s future evolution and what human beings will become in the future. Human somatic cells have a total of 23 pairs of chromosomes. Pairs 1 to 22 are shared by men and women and are called “autosomes”, while the 23rd pair determines the sex of humans, which is called “sex chromosomes”. Male sex chromosomes consist of one X chromosome and one Y chromosome, while female sex chromosomes consist of two X chromosomes.
Whether the offspring of humans is male or female is not determined by females, but by males. When male X chromosomes are combined with female X chromosomes, the offspring born are female stars. When the male Y chromosome is paired with the female X chromosome, the child born is naturally a male. Therefore, if your children are all girls, don’t blame your wife, you can only blame it. yourself.
Chromosomes are very important substances in the human body. It determines the future of human beings and determines the evolution of human beings. The chromosomes carry many genes. Through continuous research, scientists have found that 16 million years ago, the Y chromosome of human ancestors carried more than 1,500 genes, while there were fewer than 50 effective genes on the Y chromosome of humans. Its length is only one-third of the X chromosome.
Some people may say, what can this explain? In fact, the answer is obvious. Scientists have discovered through this research that they actually want to tell us that the Y chromosome of men is constantly shortening. If one day, it is shortened to disappear completely, then where will men go in the future? Will men disappear in the future? Without men, how can human civilization continue to multiply and thrive?
Professor Jennifer Graf from La Trobe University in Australia pointed out at the International Genomics Conference that, on average, every 1 million years, the human Y chromosome will lose 10 genes. At this rate, it will be less than 5 million years in the future. Within a period of time, the human Y chromosome will disappear completely.
Without the Y chromosome, can men still exist? If it exists, is it still a normal male? Many people may be worried that after the complete disappearance of the human Y chromosome, the male may disappear, or it may evolve into another feminine male. So why does the Y chromosome keep getting shorter as humans continue to evolve?
Only when we uncover the mystery of Y chromosome shortening, we may be able to save men in the future. Scientists have discovered through research that whether it is X chromosome or Y chromosome, in fact, they have been undergoing reorganization and changes during the evolution of humans. This is a sort of genetic change. In the long process of human evolution, chromosomes will continue to reorganize.
In the process of recombination, a certain segment of the chromosome will be broken, and then rotated 180 degrees before rejoining. This process is called “chromosome inversion” by scientists. In this process of reverse reconnection, chromosomes will be lost and damaged. Theoretically, the X chromosome will also become shorter, but the real situation is that only the Y chromosome keeps getting shorter, and the X chromosome length does not change significantly. Why is it so?
In fact, the main reason is that the X chromosomes are twins. Women have two X chromosomes. After “chromosome inversion” damage occurs inside the chromosomes, the X chromosomes can be repaired to a large extent through the characteristics of twins, so the X chromosomes will not be lost much. gene. However, the Y chromosome is an only child, and it has no twin brothers or brothers. So after the “chromosome inversion” occurs, there is no sibling to repair it, and it can only keep getting shorter.
After a chromosome inversion occurs, the positions of genes on the Y chromosome will be rearranged, which can easily make them entangled or even useless. Therefore, these inverted segments are often deleted. Over time, the positions on the Y chromosome There are fewer and fewer genes.
According to this evolution, after 5 million years, will the Y chromosome really disappear completely? There are also different opinions on the love of science. Some scientists believe that the evolution of life is a very complicated and mysterious process. Although the Y chromosome is getting shorter, it will stop when it gets shorter to a certain extent. Moreover, the Y chromosome itself also has a certain gene mutation function during the process of breakage and recombination. Therefore, there is a high probability that the genes on the Y chromosome of humans will not continue to decrease, and it is likely to have a limit.
Of course, even after millions of years, the human Y chromosome will not disappear completely, but because it has become very short, it will still have a big impact on men. This effect is not reflected in the function of the offspring, but mainly in the appearance. As the Y chromosome has become very short and the X chromosome has become the mainstream, men at this time will show more feminization, for example, they may not No matter how long a beard grows, the pores will become as delicate as women.
In short, many of the external characteristics of modern men may disappear in the future and become new men. This type of male has a name in modern times that is niangpao, that is, more and more feminine, losing masculinity. Of course, this change is the result of shortening the Y coloring under the normal evolutionary evolution of nature.
But what if human technology participates in human evolution in the future? We all know that mankind has entered the age of science and technology, and the power of science and technology is endless. With the rapid development of human technology, it may not be difficult to master the mystery of life and the mystery of genetic evolution in the future. If humans have powerful genetic technology, there is a high probability that they will use this technology to intervene in the evolution of humans.
Under normal circumstances, the human Y chromosome will continue to become shorter in the future. The reason for this shortening is the result of genetic evolution and recombination. But if we use genetic technology to make this evolutionary reorganization go in a better direction and remove the bad aspects, then the male Y chromosome may stop getting shorter, and may even grow longer in the future, becoming the same as the X chromosome. long.
This shows that the development of technology can change many things in the future. The evolution of mankind may not proceed according to the wishes of nature in the future. The reason is simple. The evolution of genes under the guidance of nature is carried out under the ecological environment of the earth. And the future of mankind will inevitably move toward the starry sky, and to explore the universe. At that time, human bodies need to be able to adapt to the environment of the universe.
Natural evolution cannot adapt the human body to the environment of the universe, so we can only use unnatural evolution and genetic modification to make human beings have stronger physical strength to adapt to the environment of the universe and the environment of outer planets. Only in this way can human beings realize interstellar navigation and spread their footsteps to every corner of the universe.