Fundamentals of Advanced Genetics. Advanced genetics is the study of how genetic information is stored, regulated, transmitted, and altered at molecular, cellular, organismal, and population levels. It builds upon classical Mendelian genetics and integrates molecular biology, genomics, bioinformatics, and systems biology to explain complex biological phenomena and disease mechanisms. At its core, genetics seeks to understand the relationship between genotype (the genetic makeup of an organism) and phenotype (the observable traits), while advanced genetics extends this relationship to include gene–gene interactions, gene–environment interactions, epigenetic regulation, and large-scale genomic variation. Genetic Material and Genome Organization The genetic material of most organisms is DNA, organized into chromosomes within the nucleus of eukaryotic cells. Each genome contains both coding regions (genes that encode proteins or functional RNAs) and non-coding regions, which play critical regulatory and structural roles.