Evolutionary Fitness

In evolution, fitness1 is about success at surviving and reproducing, not about exercise and strength. Of course, fitness is a relative thing. Reproductive fitness2 reflects the ability of individuals to pass on their genes to subsequent generations.

Fitness traits, also referred to as life-history traits, include measures of fertility and mortality and are complex phenotypes that are direct targets of Darwinian selection.

A genotype’s fitness depends on the environment in which the organism lives.

References

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