Substantiality of the thesis is the question of moral and ethic in the sphere of developing genetic and inheritance research. Thesis is especially focused on ethics consequences which result from the application of this research. Thesis is divided in two parts. First part contains general information about genetics science and it is more likely descriptive. This part outlines fundamental principles of genetic, its evolution and genetics breakthroughs and their today exploitation. Thereinafter are mentioned genetics techniques divided in singles areas of interest with main focus on human genetic manipulation {--} main topic of the thesis. Close of this part is dedicated to the theoretical aspects of the ambition in the field of human changing and the description of achieved goals. There are mentioned controlling and regulating mechanisms as conclusions of the first part of the thesis. Opinion on regulation of clerical representatives, civil law, laic public and scientists themselves are referred-to. Second part of the thesis is focused directly on the ethics risks of the practical use of genetic technologies and their impact on human being. The principles of catholic ethic are foreshadowed. The expectations of human genetic improvement are confronted gradually by those principles. [90] Statement, that the human improvement by the genetic manipulation is non tenable by means of the Christian ethics is a conclusion of this thesis.