In the fields of molecular biology and genetics, a genome is the genetic material of an organism. It consists of DNA (or RNA in RNA viruses). The genome includes both the genes (the coding regions) and the noncoding DNA, as well as mitochondrial DNA and chloroplast DNA. The study of the genome is called genomics.
A genome is all the genetic information of an organism. In meiosis, the genetic material of gametes is divided in half to create egg and sperm cells, which have only one copy of the book.