is equal to the average contribution to the gene pool of the next generation that is made by an average individual of the specified genotype or phenotype.[2]
In population genetics, a measure of the relative survival and reproductive success of a given phenotype or population subgroup.[3]
the capacity of an organism to survive and transmit its genotype to reproductive offspring as compared to competing organisms[4]
the contribution of an allele or genotype to the gene pool of subsequent generations as compared to that of other alleles or genotypes[4]
Fitness is measured as the proportion of genes contributed to the next generation by an individual relative to the contributions of others. It is equal to the relative probability of survival and reproduction for a genotype.[5]
↑ natural selection always progresses uphill but can only do so locally
