Final answer:
Genomics involves studying entire genomes, while sequence mapping compares the DNA sequences of individuals, and functional genomics focuses on gene function.
Step-by-step explanation:
Genomics is the study of entire genomes, including the complete set of genes, their nucleotide sequence and organization, and their interactions within a species and with other species. Genome mapping is the process of finding the locations of genes on each chromosome. A genetic map is an illustration that lists genes and their location on a chromosome. Genetic maps provide the big picture and use genetic markers. Comparing the DNA sequences of individuals within a species is known as sequence mapping. It involves analyzing the similarities and differences between the DNA sequences of different individuals to identify variations and understand genetic diversity. Identifying the function of genes within a genome is known as functional genomics. It involves studying how genes work and what role they play in various biological processes.