Generally speaking, people's psychology is not genetic, it is mainly the day after tomorrow under the influence of social environment, in the person's social practice has gradually formed and developed, however, a man who, as a whole (including the body, mind, two aspect) and the relationship between genetic factors, but very close, especially a person's size, temperament, characteristics of neural activity, ability and character of certain ingredients are subject to the direct impact of genetic factors.

Throughout history, man's mental energy can not be genetic, there have been genetic determinism dispute. For example, the 19th century the British scientist Francis Galton (A. Galton) has published a "genetic talent and character" and "genetic. Genius "and many other books that people's psychology, including talent and personality are genetic to decide. In China there are the so-called dragon dragon, phoenix begets a phoenix, mouse holes of Health child will say, but also that human psychology can be determined by the genetic. However, the theories of the behavioral psychology was firmly opposed to genetic determinism and advocate human psychology and behavior is another environmental decisions. The early 20th century founder of behaviorism Watson (J. B. Watson) once said that to give him a dozen children, he can mold them into scientists, musicians, rogues or thieves and so on. Both views are too biased.

If we say that a person's mental abnormality or mental illness is inherited, and this will obviously not convincing. But we said that some mental abnormality or mental illness and genetic factors are closely related, it is logical. In recent decades, due to molecular biology, molecular genetics and cell genetics significant progress in the study demonstrated the impact of revealing the genetic material basis to clarify the specific genetic mechanism has been made possible. Mental illness, mental breakdown disorder, manic depression and erythema epileptic psychosis so-called endogenous mental illness, genetic factors in the pathogenesis of the process is a very important role. Some of the families of mental patients to investigate and study found that the relationship between blood relatives from far to near, the prevalence rate from as little more than a trend. The relationship between their specific table.

COSCO mentally ill family members, close relatives the prevalence of

Prevalence of genetic relationship

Parents 33.21%

Compatriots 30.10%

Fellow parents 13.56%

Grandparent 12.66%

The first generation of cousins and sisters 6.46%

Second-generation cousin sisters 4.20%

Uncle uncle and aunt Biaojiu 3.64%

Today, the role of genetics have had sufficient scientific basis for the fact that genetic material factor in the chromosomes, the so-called genes, while the chromosomes are in the cell body. So, what is the chromosome and genetic material? The parents how genetic information is passed on to children, and thus from generation to generation it? Modern molecular biology and molecular genetics studies have shown that the genetic material known as deoxyribonucleic acid (DNA). Chromosome is tightly coiled double-helical RNA molecule. This gene is a small section of DNA molecules, proteins and enzymes carrying genetic information, such as cooperation.

Biological traits between individuals is the same or similar genetic performance. But this is only one side the problem; the other side is a biological trait differences between individuals or differences, referred to as variation. The successive generations of human hereditary basis. Due to variations in genetic material caused by the disease, known as the genetic disease. Variations in genetic material appear in the chromosomes, commonly referred to as chromosome mutation (or chromosome aberrations); appeared in the genes, commonly referred to as gene mutation. Mutated gene, known as the mutant gene. Traits caused by mutant genes are mostly within the normal range, a few can cause abnormal body structure or function, known as disease-causing gene. Disease-causing genes are also explicit and implicit distinction. Dominant in the case of successive generations can be symptoms, such as a hidden, possibly in the inter-generational will produce symptoms. And genetic-related diseases can be grouped into three categories, only because of genetic mutation, called single-gene genetic diseases; a category is caused by a chromosomal aberration, and environmental factors known as the multi-gene genetic diseases. And genetic-related mental illness, is generally believed that bipolar disorder (especially depression) and the single-gene autosomal dominant factor in the relevant departments; Down's syndrome (also known as Shen She kind of dementia or Down's syndrome) is caused by chromosome aberrations Genetic disease; mental breakdown of disease, it was considered to be a single-gene recessive genetic diseases; but more people think that with the multi-gene genetic factors.