Final answer:
An organism's genome consists of the DNA found in all of its chromosomes, which includes the codes for all proteins, RNA molecules, and regulates gene expression.
Step-by-step explanation:
An organism's genome consists of the DNA found in all of its chromosomes. This complete set of DNA contains all of the genetic information necessary to build and maintain the organism, from physical traits to biochemical processes. The genome includes both genes that code for proteins and stable RNA molecules, as well as non-coding regions that play important roles in regulating gene expression and maintaining the genome's structure.
Genomics is the study of genomes and involves sequencing, analysis, and comparison of the complete genetic content within an organism. Variations in the genome account for differences between organisms and contribute to evolutionary processes. Both eukaryotes and prokaryotes have genomes, but their organization differs: eukaryotic genomes are made of multiple linear chromosomes within a nucleus, while most prokaryotic genomes consist of a single, circular chromosome in the cytoplasm.