Looking at one gene at a time is no longer sufficient. Genomics is the study of entire genomes—their structure, function, evolution, and interaction with the environment. High-throughput sequencing and computational analysis make it possible to examine all genes and intergenic regions simultaneously.

Functional genomics explores what genes do; comparative genomics contrasts genomes across species; medical genomics applies the knowledge to health and disease. Large consortia generate reference data that individual laboratories build upon.

Genomics has accelerated gene discovery, illuminated complex disease architecture, and enabled precision medicine approaches. Challenges include data interpretation, storage, and equitable access. The field continues to expand as sequencing costs drop and analytical methods improve.

• Study of complete genomes
• Encompasses structure, function, and evolution
• Relies on high-throughput sequencing
• Underpins modern precision medicine