Why do people and individuals do not have tails like monkeys, although there are some common characteristics of appearance? This question has long been confused by scientists. Recently, a study was found to explain on the problem on the 9: 00/4: 32 nam nuns and monkeys. Random gene variables in a study published on Biorxiv pages, houses Science said that no tail in humans was due to a single gene mutation that randomly appeared about 20 million years ago, when a gibbon was born without tail and then transferred this mutation Its descendants. The main false of this study is Bo Xia, a graduate student in stem cell biology at Grossman medical school, New York University (USA). The author said, wondering about people who had no tail came to him as soon as he was young
. For 2019 by 2019, after a surveyed trip in a bumpy hills, he was hurt bone. During the healing period, Xia began to think deeper on this issue and cared more about a coccyx in humans. "Why doesn't people have tails?" Also appeared in the scientific world for a long time, but no research has been in this matter
Archaeologists have discovered a first elimination fossil with 66 million years and this is a tail with a tail. But at the time of 40 million years later, when a large species called Proconsul appeared, the tail in this category was disappearing.Charles Darwin first marked a strange lunch between the primates and people in the century 19. He caused debate when he thought that man also had tails. Darwin wrote in 1859: "I believe that os penguin can be attached to some certain muscles and no doubt that is the rudimentary form of the tail". To learn more about this issue, Xia has Check how the tail is formed in the embryo. Conducting a study comparing DNA among people and gibbons with tails, he found a mutation in the TBXT gene that people also have. Itai Yanai scientist, one of XIA's research supervisors said, this is an incredible result. To check his theory, Xia and his colleagues injected into mutually mice TBXT. As a result, these mice do not grow tail or just grow short
In other words, Xia and his team found a mutation inhibiting the development of the tail. They said that this surge randomly attacked a gibbon about 20 million years ago, making it a tail . However, this defective animal still survived and even developed, passing this mutation to its children. Finally, the mutant form of TBXT has become the standard of gibbons and people. However, they acknowledge other genes also have impacts. On the other hand, mice react to mutations in different ways. Meanwhile, in humans, there are equally coccins.Bo Xia and summarize his research building. The remaining challenges mouth, Xia and colleagues may have found the reason why ancestors of We stop developing the tail, but there are still many difficult questions about human evolution. The first gibbons are greater than monkeys and the size, increasing body weight will make them easy to fall from branches And it is likely that those falls lead to death. It is difficult to explain why gibbons do not have tails, difficult to keep the balance do not encounter considerable disadvantages in terms of evolution. For people, the lack of a tail doesn't have any problems. The tail grows into a strong pelvic muscles, helping us take the first steps when standing straight. So, the loss can be considered an adaptation to a specific environment, which allows this Our ancestors leave the tree and walk on the ground. With some adjustments, the original man can not only walk, but also can jog on the meadow. Some cases of people born with tails also make confused scientists. According to the study, there is "40 cases where people are actually reported in the". Currently because Pramod Janardan Giri and VaiBhav Sharadrao Chavan are published in the Asian Journal of Neurosurgery in 2019, involving a 17-year-old male in India with a 18 cm long tail. The discovery shows that this is the cause of spine cracking in him. According to the parent of the study object, "this tail is a gift from Hindu's monkey god," Hanuman ". Therefore, they named their children by this name. It was forever until the young man started to feel ashamed by his long tail and physical discomfort, they took him to the hospital for surgery to cut off. Doctors said that could be sick Multiply a nerve anemia and a tail since when she was in the womb, but the tail was only after he grew up. Around the question of human tails, scientists have many things to do. Xia's research only takes R . Dịch vụ:
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