The course is a study of the mechanisms of transmission of hereditary characteristics. The course covers the definition and purpose of the history of genetics, Mendel and the laws of heredity, the lethality and the interaction of genes, the physical basis of heredity, the cell nucleus and chromosomes, the theories of the chromosomal heredity, the linkage and crossing-over, genetic determination of sex, and gender heredity. The discussion will also include the inheritance of blood groups, Rhesus factor, hemophilia and color blindness and cases of mutations, gene expression, protein synthesis and the genetic code.