Relative fitness

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A measure of biological fitness expressed as the ratio of the absolute fitness of an individual (or of a genotype or of a phenotype) and the absolute fitness of a reference individual (or of genotype or of phenotype).

Supplement In biology, Darwinian fitness or simply fitness of a biological trait describes how successful an organism has been at passing on its genes. The more likely that an individual is able to survive and live longer to reproduce, the higher is the fitness of that individual.

There are two ways through which fitness can be measured:

Relative fitness is a standardized absolute fitness. It is expressed as wrel.