जीनोमिक्स एक विज्ञान है जिसमे हम आर - डीएनए,डी एन ए अनुक्रमण तकनीक एवं जैव सूचना विज्ञान का उपयोग करके जीनोम की संरचना, कार्य एवं अनुक्रमण का अध्ययन करते हैं। यह विधा जीवों के संपूर्ण जीनोम अनुक्रमण का पता लगाने का प्रयास है। इस विधा के अन्तर्गत जीनोम के अन्दर एपिस्टासिस, प्लियोटरोपी एवं हेटरोसिस जैसे होने वाली प्रक्रियाओ का भी अध्ययन किया जाता है।

Genomics is an interdisciplinary field of molecular biology focusing on the structure, function, evolution, mapping, and editing of genomes. A genome is an organism's complete set of DNA, including all of its genes as well as its hierarchical, three-dimensional structural configuration. In contrast to genetics, which refers to the study of individual genes and their roles in inheritance, genomics aims at the collective characterization and quantification of all of an organism's genes, their interrelations and influence on the organism. Genes may direct the production of proteins with the assistance of enzymes and messenger molecules. In turn, proteins make up body structures such as organs and tissues as well as control chemical reactions and carry signals between cells. Genomics also involves the sequencing and analysis of genomes through uses of high throughput DNA sequencing and bioinformatics to assemble and analyze the function and structure of entire genomes. Advances in genomics have triggered a revolution in discovery-based research and systems biology to facilitate understanding of even the most complex biological systems such as the brain.