Yellow, black and white are the three most widely distributed and typical human races on the earth, and they are also the three "branches" in the history of human evolution. These three races have obvious differences in appearance, skin color, body shape, intelligence, culture, etc., and their formation and evolution process involves genes, environment, lifestyle, migration and other factors.
It is also important to note that there is no reproductive isolation between the three races.
Formation of yellow, black and white races
The history of human evolution on Earth dates back about 7 million years, while modern humans appeared around 200,000 years ago. In the long history of human evolution, the environment has been the most basic factor in the formation of different characteristics of various races.
For example, black people are mainly distributed in Africa, Australian aborigines also have dark skin, which is closely related to their long-term living in tropical and subtropical environments, and the accumulation of melanin is also to protect the skin from strong ultraviolet damage.
In the cold weather in Europe, it is the basic environment formed by Caucasians, they are more adapted to low temperature environment, light skin absorbs sunlight, conducive to the synthesis of vitamin D.
In East Asia, the formation of the yellow race is related to the rise of rice agriculture, they have adapted to the changes in the living environment caused by the consumption of large amounts of rice, and the East Asian environment has less ultraviolet rays, making their skin gradually yellowish.
In such a long period of evolution, due to factors such as natural selection and genetic mutations, different populations have gradually formed genes and shapes with different characteristics.
The branches and differences formed by human beings are more obvious, in addition to yellow, black and white people, there are also red people, brown people, etc. Genetic differences between these populations can be confirmed by DNA, mitochondrial DNA, Y chromosomes, and a variety of accurate genetic data.
Mixed descendants of yellow, black and white people
Although there are obvious genetic and physiological differences between different races, there is no reproductive separation between different races, because no matter what race, their premise is that they are human beings, and there is no essential difference. In human history, it is not uncommon for different races to reproduce due to migration, communication, conflict and other reasons.
This reproduction often gives offspring a variety of different characteristics, thereby enriching the human gene pool and promoting the diversity of human evolution.
Mixed offspring between yellow, black, and white people are not uncommon. For example, the historical migration and exchange of human beings on the Eurasian continent have led to the mixing of blood between Europe, the Middle East, and Asia, resulting in mixed blood after racial integration.
In the Americas, Africa and other regions, there are also different degrees of mixed race. In modern society, due to globalization and open culture, diverse communities and marriage environments, the number of mixed-race offspring has increased significantly and has become a common phenomenon.
Black and white people have different patterns of skin color genetic inheritance, and although their offspring may have slightly mixed genetic expressions, in general, genetic differences between black and white people still affect the skin color expression of their offspring.
In addition, the yellow people's eye structure is also different from that of other races, and even if the descendants of yellow people are mixed with white people, they cannot have dark eyes like pure white people.
Finally, the formation of yellow, black and white people involves not only genetic and environmental factors, but also a variety of factors such as history, society and culture. There is no reproductive segregation between races, because yellow, black and white people are all human.
In the process of human evolution and cultural diversity, we should build a better, equal and harmonious world based on openness, inclusiveness and respect.
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