G

Gene: The basic unit of heredity; a sequence of DNA nucleotides on a chromosome

Gene frequency: The relative occurrence of a particular allele in a population

Gene mapping: Determination of the relative positions of genes on a DNA molecule (chromosome or plasmid) and of the distance, in linkage units or physical units, between them

Genetics: The study of inheritance and the variation of inherited characteristics

Guanine: One of the four nucleobases found in DNA. Guanine (G) always pairs with cytosine (C)