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(b) Fitness
(b) Fitness
In this short section, we will learn about how the "fitness" of an individual within a population can be defined in absolute or relative terms.
In this short section, we will learn about how the "fitness" of an individual within a population can be defined in absolute or relative terms.
Fitness is an indication of an individual’s ability to be successful at surviving and reproducing.
Fitness is a measure of the tendency of some organisms to produce more surviving offspring than competing members of the same species.
It refers to the contribution made to the gene pool of the next generation by individual genotypes.
Relative & Absolute Fitness
Relative & Absolute Fitness
Fitness can be defined in relative or absolute terms, as outlined below.
Absolute fitness
Absolute fitness
Absolute fitness is the ratio between the number of individuals of a particular genotype after selection, to those before selection.
If the absolute fitness is 1, then the frequency of that genotype is stable. A value greater than 1 conveys an increase in the genotype. A value less than 1 conveys a decrease.
Relative fitness
Relative fitness
Relative fitness is the ratio of the number of surviving offspring per individual of a particular genotype to the number of surviving offspring per individual of the most successful genotype.
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