is an indication of an individuals success in surviving and reproducing
fitness refers to the contribution made to the genepool of the next generation by individual geneotypes
fitness can be defined by absolute or relative terms
absolute fitness
the ratio of the frequency of a particular genotype in a generation to its frequency in the previous generation (G2:G1)
relative fitness
the ratio of the number of survivingoffspring per individual of a particular genotype to the number of surviving offspring per individual of the most successful genotype
