Genomics is defined as the branch of molecular biology that deals with the structure, function, evolution, and mapping of genomes. Genomics uses DNA sequencing methods, and bioinformatics to sequence, assemble, and analyze the structure and function of genomes. Specialists in genomics strive to determine complete DNA sequences and perform genetic mapping to help understand disease. Genomics also involves the study of intragenic processes such as epistasis, heterosis, and pleiotropy as well as the interactions between loci and alleles within the genome.