On the construction of the system biology curriculum content, the author in “high school biology curriculum construction and the analysis of steady-state and the environment module,” a discussion paper made that like “Genetics and Evolution” content, can be the method of formal logic, determine the number of scientific facts or concepts as a logical starting point, through axiomatic deductive reasoning to build a system. [1] This paper intends to make a concrete analysis of this.

First, the construction of modern genetics theory

First of all, through observation and scientific experiments perceptual knowledge, it is through pea hybridization experiments Mendel obtained extensive experience in materials. However, the emotional understanding of the material was only the first step in understanding the real task is to achieve rational. This requires a scientific approach to the material. How to deal with? First of all, these experiences should be summarized material reflected the essence and variety. This requires scientific abstract. The so-called scientific abstract thinking is that people use, through the phenomena of things, taking out the essential nature of things and changes in the law of development. Scientific abstract is a complex thought process, the first step is to form the basis of experience, the concept of material is from the “emotional on the specific” up to “abstract rules.” The so-called “Emotionally specific” scientific practice is that people formed in the surface of Chaos; so-called “abstract”, a provision is through a certain method to abstract the essential properties of things. It is from a large number of Mendelian peas specific genetic traits (flower color, cotyledon is full, the plant height, etc.), the abstract “relative character” concept, and further it is divided into “dominant characteristics” and “hidden of character. ” The second step is to determine the use of concepts and reasoning, construction law, principle, that is, from the “provisions of the abstract” to “thinking in the concrete.” “Thinking of the specific” is different from “emotional on the specific” sensitive material is no longer the sum of the facts of the chaos, but rather dominated by certain rules of organized knowledge. Mendel is the basis of relative characteristics, dominant traits and recessive traits such concepts, summed up the phenomenon of separation and the free combination. The entire process from the perspective of logic method is a process of inductive reasoning. Provided that a number of scientific facts, the conclusion from the premise through reasoning by general law. Awareness activities in science, science and logic is the same abstract understanding of the process the two sides. On the one hand, understanding the abstract process is a continuous process of formation of scientific concepts; other hand, the recognition process is a method to judge the use of logic and reasoning process.

Understanding of the phenomenon of separation and the free combination, the Mendel did not stop, he began to establish genetic hypothesis. In scientific research, when knowledge of scientific facts to reach a certain level, it must pass the dynamic role of theoretical thinking, using a variety of theoretical thinking and sorting and processing methods, to establish a scientific hypothesis. This is an important part of deepening and general methods. The times in the Mendel, the prevailing scientific theory is Newton’s method of thinking. Newton in “The Mathematical Principles of Natural Philosophy” in the scientific method first proposed rule, the principle is simple. [2] on the “simple principle” concept to define, since there is no academic consensus. Newton and Mendel are the simple principle of the use of the meaning of the simple nature of things inside, that is that in the understanding of nature, the most simple explanation is always desirable. As Einstein said: “Our so-called simplicity, does not mean that students master the difficulties arise when this system the minimum, but that such a system independent of each other contained in the assumptions or public at least.” [3] In this context, modern science, Dalton first in the 19th century in accordance with the principles of simplicity, the macro, high-level, with the senses can perceive but not clear enough understanding of the diversity of chemical substances, complicated, broken down into unlimited number and type of the number of micro-less, low-level, the physical senses can not directly detect the smallest atomic particles —- (then Dalton’s knowledge), then links between atomic and interaction, to understand, explain, explain the chemical form, structure, function and properties of the infinite diversity, complexity, and to chemical substances and chemical changes on the full, deep understanding, and thus laid the foundation for modern chemistry. Mendelian genetic factor in the creation of their hypothesis in the process of drawing daltons atomic theory has knowledge model, we do not know. But he used the success of the principle of simplicity. He established the existence of genetic factors model pair and create a symbol system to express, to a limited type of an infinite combination of genes to explain the existence of limitless forms of life.