Genetics is a basically a study in heredity, particularly the mechanisms of hereditary transmission, and the variation of inherited characteristics among similar or related organisms. One of the branches of genetics is molecular genetics. It is regarded as the most advanced field of genetics. One of its sub-fields is genomics (the other is proteomics). Genomics is a study of all the nucleotide sequences in the chromosomes of an organism. This includes the structural genes, regulatory sequences, and noncoding DNA segments. Its focus is not on the structure and function of a single gene (as it is in molecular biology) but on the complete set of genetic material in an organism.
Genomics employs biotechnological methods such as recombinant DNA and DNA sequencing methods. It also uses bioinformatics to sequence, assemble and analyze genomic structure and function. One of its most essential applications is the international collaborative efforts on human genetic mapping, the Human Genome Project. Genomics also include studies on the interactions between loci and alleles within the genome.
Word origin: Ancient Greek geneá (generation, descent) + -omics (a study of the totality of something)