Let’s find out everything about some species
What would it mean to learn everything about a given
species? All available evidence indicates that the complete
blueprint for making an organism is encoded in the
organism’s genome. Chemically, the genome consists of
one or several DNA molecules. These are long strings
composed of pairs of nucleotides. There are only four
different nucleotides, denoted by A, C, G, T. The
information about how to make the organism is encoded
by the order in which the nucleotides appear.