Are Adam and Eve the same ancestor of mankind? For many years, it was generally believed that this was just a religious statement. However, scientists have come to the conclusion through DNA comparison that all people on the earth are from Africa regardless of their skin color. From the genetic point of view, the difference (genetic variation) between skin color and hair of modern people is a very small change. From a biological point of view, we all belong to the same species, and we all come from a pair of parents 6.5438+0.5 million years ago. Young people, even adults, often wonder whether all races come from the same human ancestor. Of course, in theory, this question is like asking whether children with different skin colors come from parents with the same hair. Just as some people today carry the same genes to produce offspring with the same skin color, the first parents of human beings have produced races with different skin colors through the same genes. Today, you and I may not be able to carry the genes that made all races, but the first generation of human parents did. All human characteristics can be inherited by genes, but not everyone can inherit these genes. For example, everyone may carry genes of various eye colors (such as gray, green and blue), but not everyone carries these genes, so everyone's eye colors are different. Therefore, some parents with dark hair may give birth to blond children, but those with blond hair (because they only inherit a recessive gene) can't give birth to brunette children unless the blonde child's spouse has black hair. If the spouse of a blonde child is also blonde, their offspring can only be blonde, even if their ancestors have black hair. In real life, only one species-human-has diversity and substitutability. Evidence from science shows that human micro-evolution (such as biological variation of dogs, cats, horses and other animals) is possible, but not everyone has this evolution. The only evolution took place in nature, but not in a macro sense. The micro-evolutionary ability of genes exists in nature, but not all genes have the ability to realize macroevolution. Macroevolution is impossible unless the species in nature have considerable intelligence. Today, we have all kinds of dogs, many of which did not exist hundreds of years ago, which can also prove the micro-evolution theory of nature. In other words, no matter how complex and diverse dogs are, they are still dogs, and they will not become other animals or evolve into anything else. Even the hybridization of animals or plants does not support Darwin's theory of evolution. What is hybridized will not produce new genes, but only a combination of existing genes. In today's world, people often modify and recombine some existing genes, but they cannot produce brand-new genes or brand-new species characteristics. This is an absolute fact. For example, the change of hair gene may change human hair, but this change will not affect the overall characteristics of human hair. As for fingers, toes and other aspects, their genes can be changed, but they will not produce new features. Evolutionists believe that as long as there is enough time, the change of gene code caused by environmental factors (such as radiation) will produce brand-new genes and brand-new species characteristics, which is the behavior of self-selection and self-protection of species in nature. But there is no scientific evidence to confirm this view, and it is impossible to see that genetic changes can produce completely new species. Environmental changes are not enough to promote the birth of new genes. The above theory seems to be used to explain the origin of human beings. Where do humans come from? In the west, it is said that God created man, and Adam and Eve are the same ancestor of mankind. Is this an unscientific explanation? For many years, people generally believe that this is only a religious view, and where human beings come from seems to be our eternal mystery. At the beginning of 1988, Newsweek published an interesting dynamic report on scientific research entitled "Looking for Adam and Eve". The main content is that scientists trace back to DNA and think that the ancestors of modern human beings were women who lived 200 thousand years ago. Today, the gene of this female ancestor exists in everyone on earth, that is to say, there are 5 billion people in the world who are related by blood. Scientists call her Eve. In order to find a scientific explanation, scientists have done a lot of research. From 65438 to 0987, Rebecca Kahn of the University of Hawaii purified DNA samples from women all over the world to find a unique substance called mitochondria. Mitochondria exist in cytoplasm and are called energy supply stations of cells. It has its own DNA and can replicate independently. The next generation of mitochondrial DNA generally comes only from the mother and is passed down from generation to generation, so it is a good genetic marker. The result of the experiment is surprising. It shows that all the genes of modern women come from a woman who lived about 6.5438+0.5 million years ago. Subsequently, geneticists successfully deciphered the Y chromosome code of male genes again. They come to the conclusion through research that all modern people have a father like him, and he should have lived 6.5438+0.5 million years ago. So, can we say that we modern people all had a pair of identical ancestors before 1.5 million years ago? Geneticists can find the answer through blood analysis according to the modern human body. The human gene consists of 300,000 base pairs, and each of the 6 billion modern people has its own unique gene. Finding a unique set of markers in these genes is like looking for a needle in a haystack. After careful selection, the experts selected the main male gene Y chromosome as the main direction of attack. According to experts, the advantage of Y chromosome is that its size is much larger than that of mitochondrial DNA, which is only 16000 nucleotides. For Y chromosome, if you can use non-recombinant fragments, it is about 600 million nucleotides, so its information is much larger and the theoretical results are much more reliable. On the other hand, mitochondrial DNA only reflects maternal inheritance or maternal migration. Y chromosome is just the opposite, reflecting the origin and migration of paternal line, so geneticists began to study Y chromosome systematically from 1993 and 1994. Scientists have created an evolutionary clock by comparing DNA. By comparing the differences of DNA, they came to a conclusion that all people on the earth, regardless of their skin color, are from Africa. From a genetic point of view, the difference between skin color and hair of modern people (genetic variation) is a very small change. From the biological characteristics, we really belong to the same species, and we both came from a pair of parents 654.38+0.5 million years ago. Therefore, although there are different opinions about Adam and Eve as human ancestors, at least scientists have confirmed that human genes have changed very little since 6.5438+0.5 million years, and humans do have a pair of ancestors.