Among mammals, the gender is mostly determined by XY chromosomes. Generally, women are two XX chromosomes, while men are X.
However, some scientists have found that the length of Y chromosomes is gradually becoming shorter, and even a very small number of mammals have disappeared. Once this key chromosomes that determine the gender of human beings have disappeared, will there be men in the future?
First, Y chromosome is disappearing. What is determining gender?
Scientists have found that 300 million years ago, the volume of YX two chromosomes was the same. However, after 100 million years of time, Y chromosome was constantly degraded, and it was likely to disappear after 4.6 million years.
Why is the Y chromosome change?This is related to the SOX3 gene of primitive chromosomes into SRY genes.
Sry gene is a key gene for modern Y chromosome to determine male sex.When the sry gene is mutated, it will be accompanied by chromosomes. The SOX3 gene is still at the bottom of the X chromosome, but the Y chromosome runs to the top position.
This behavior will cause the Y chromosome gene to re -arrange. After changes, the genes deleted deleted by Y chromosomes are lacking backup and cannot be made up. In the end, the Y chromosomes cannot be repaired, which is becoming shorter and shorter.
Once Y chromosome disappears, does it mean that humans will have no gender?
On November 28, 2022, the research team from Hokkaido University in Japan used the DNA repeated sequence that existed only in the male individuals in the Amami Strang, which revealed a new gender decision mechanism independent of Y chromosome.
Researchers found that the gender decision mechanism of Amami Strang has been transferred from XY chromosome to ingredients, which is also the first case in mammals.
The Amami Strang has a new gender regulation mechanism. So the day when the human chromosomes disappear, will it may also evolve the gender mechanism of ivable chromosomes?
Second, women’s life span is longer than men, or it is related to the disappearance of Y chromosome
Judging from the data released by the National Bureau of Statistics, women’s expectations have gradually increased compared with men. In 2015, women’s life expectancy increased by 2.66%compared with 2010, while men only increased by 1.74%.
As we all know, genes are the underlying passwords of life.Men’s life is generally shorter than women. Is it related to changes in Y chromosomes?
In a research on Science, researchers found on the mouse model that the loss of Y chromosome will transform mice’s blood cells and promote myocardial fibrosis, which will cause a series of cardiovascular disease risks.
Another incorporated more than 15,000 men, 11.5 years of follow -up data shows that the disappearance of peripheral white blood cell Y chromosome peripherals is more than 40%, which is related to the rising analysis of cardiovascular disease by 31%.
In addition, men’s life span is shorter than women, and it is also affected by various factors–
Cholesterol is divided into “good or bad”, and bad cholesterol will increase the risk of cardiovascular disease. Good cholesterol can reduce the level of cholesterol in the tissue.
Studies have found that “good cholesterol” in women’s bodies is higher, while men’s “bad cholesterol” content is higher.This may be related to the protection of female estrogen.
In addition to natural advantages, women are more “particular” than men.
Studies have found that men’s smoking and drinking proportion is higher than that of women, and adventure is more common. Some special occupations are also bear by men.These are also the reasons for the differences in the life of men and women.
Third, if men want to live for a long life, don’t forget to do these 4 things
Of course, the average life expectancy is just a reference.Among the longevity, the proportion of men is not uncommon.For men, how can I do it to extend my life?
1. Pay attention to health
In the face of diseases, men often seek medical treatment than women, thinking that they can “carry”, thereby ignoring some disease signals, leading to missing the best treatment time.
Once discomfort occurs, do not think that you are a “tough guy”, fearless, and go to the hospital for examination in time to avoid missing the early stage of the disease.
2. Dispetement pressure
Many men in life are bound to “men have tears and do not bomb.” When there is negative emotions, they are also used to digestion.
If the correct venting is not obtained for a long time, the emotional tolerance is extremely endless, and extreme events are often prone to eruption.Therefore, men must also learn to communicate, learn to relieve stress, and avoid negative emotions to suppress themselves.
3. Reduce drinking
Drinking is related to a variety of diseases, including fatty liver, liver cirrhosis, and various types of cancer.According to relevant data monitoring, my country’s adult male drinking rate was 65.4%, and the average daily drinking volume reached 30 grams, exceeding the safety drinking standard (≤15 grams).
If you want to be healthy, you must control the amount of alcohol. When you find a basic disease, it is best to quit alcohol.
4. Appropriate exercise
According to the “Liuye Dao” research report, a quarter of the world’s men’s sports are not up to the standard.
Lack of exercise for a long time, it is easy to accumulate abdominal fat, thereby destroying body and health.If you want to live long, 150 minutes of aerobic exercise per week cannot be absent.
Whether the Y chromosome disappears and what will happen after disappearing? These answers may only be answered after 10,000 years.As far as you are concerned, at least you can choose a healthy lifestyle to maximize the potential of health.
 “Y chromosome is gradually disappearing!Without the Y chromosome, who will determine gender?”. Biological exploration. 2022-12-05
<!-1924: Men terminal page10-21
 “Science”: Y chromosome makes male more fragile!Scientists find that the loss of Y chromosome will promote myocardial fibrosis, which is related to the risk of death of male cardiovascular disease by 31%丨 Science Discovery. “