Biological genetic factors.
The view that heredity plays a decisive role in human development is wrong.
Heredity:
1. Inheritance is a similar phenomenon between biological parents and offspring, and between offspring individuals. Heredity generally refers to the phenomenon that parents' traits are manifested in the background. But in genetics, it refers to the phenomenon that genetic material is passed from one generation to the next.
2. For example, her father is color-blind and her daughter has normal vision, but she got the color-blind gene from her father, and she has a half chance to pass it on to his children, showing the color-blind character.
3. So from the point of view of personality, my father is color blind and my daughter is not. But from the perspective of genetic continuity, it is passed down from generation to generation, so it is considered that color blindness is hereditary.
4. Genetics is a discipline that studies this phenomenon. At present, it is known that the existing life on earth is mainly based on DNA. In addition to heredity, the factors that determine biological characteristics are also the environment and the interaction between environment and heredity.
Hereditary diseases:
1, Allergy and Asthma: If one parent suffers from asthma or allergies, the probability of children suffering from asthma or other allergic diseases will increase, but it will not necessarily happen, because the occurrence of diseases is not only controlled by heredity, but also affected by environmental factors, biological factors and physical stimuli.
2, myopia: myopia has a certain relationship with heredity, especially when both parents are highly myopic, the baby's chances of myopia will be greater, even if it is not myopia at birth, once it is affected by the environment, it may develop into myopia.
3, dental caries: it can not be said that dental caries itself is hereditary, but the physique that is prone to dental caries is hereditary. Parents have more dental caries, and children will not have less dental caries; The incidence of dental caries in parents is low, and vice versa.
4. Diabetes: The incidence of diabetic relatives is 17 times that of non-diabetic relatives, and the genetic tendency of type II diabetes is more significant than that of type I diabetes. Diabetes is not inherited by itself, but determined by its susceptibility.