The mankind is still small while evolving

The mankind is still small while evolving
It is reported ' Reporter Li TianShu) Is the mankind still evolving constantly? More than one centre studied the part to answer this problem. A plurality of research institutions such as mulberry a dose of research institutes, big genetic research institutes of Chinese People's Liberation Army General Hospital, China, Shenzhen of British Wellcome foundation cooperate, measure directly recently the human gene hits the mutation rate of the nucleotide for the first time, reveal the mankind is still in the constant small evolution. DNA (DNA) It is a mankind main hereditary material, the nucleotide is " chain rings " on DNA chain ,DNA part with function of science of heredity is a gene often spoken. When everybody born, DNA will produce new sudden change by various reason at the roller chain, the hereditary variation brought in the sudden change has promoted the evolution course from ape to people. The speed of sudden change is the key to studying humanbeing evolution and analysing and explaining a lot of medical difficult problems. For measure the the intersection of sudden change and speed, middle, researcher of two countries of Great Britain invest sight in man's characterized Y chromosome, because most bits of DNA are only father and son Xiang Chuan among them, will not merge the maternal gene, its change totally belongs to the sudden change of nucleotide. Researchers have found a big family in a remote small village of Jiangxi Province, among them two men are the same ancestor before 13 generations, can be traced back to time and up to 200 years. Researcher utilize the intersection of DNA sequence and technology, check order to the same pieces of DNA at the above-mentioned two male the intersection of Y and chromosome, have compared more than 10 million pieces of nucleotide with, has found 12 places are different, 8 places among them emerge during cultivation of external cell. Researchers draw the conclusion, through 13 generations of persons' accumulation, only have 4 real sudden change in these more than 10 million pieces of nucleotide. Sang Ge Xue YaLi Dr. of research institute point out most sudden change the harmless, do not have obvious influence on the mankind's health or appearance. But this research results make us precise to realize, with what kind of paces is mankind itself evolving forward. The research results not merely can help the medical researcher to understand hereditary variation, opened up the new route for the research of relevant disease of the gene at the same time.

|