This course provides an introduction to genetics, covering its history and development, key definitions, and major subdivisions. It examines Mendelian, non-Mendelian, and quantitative genetics, as well as the concepts of genes, gene linkage, and genetic mapping. The course explores cytogenetics, including karyotyping and chromosomal aberrations, and delves into molecular genetics and population genetics. Additionally, it addresses the genetic basis of carcinogenic and immunogenetic diseases, providing a comprehensive foundation for understanding heredity, variation, and the genetic factors underlying human health and disease.