Akademik

1. Well-being. 2. Suitability. 3. In population genetics, a measure of the relative survival and reproductive success of a given individual or phenotype, or of a population subgroup. 4. A set of attributes, primarily respiratory and cardiovascular, relating to ability to perform tasks requiring expenditure of energy.

- clinical f. absence of frank disease or of subclinical precursors.

- evolutionary f. the probability that the line of descent from an individual with a specific trait will not eventually die out.

- genetic f. in a phenotype, the mean number of surviving offspring that it generates in its lifetime, usually expressed as a fraction or percentage of the average genetic f. of the population.

- physical f. a state of well-being in which performance is optimal.

fit·ness 'fit-nəs n the capacity of an organism to survive and transmit its genotype to reproductively fertile offspring as compared to competing organisms also the contribution of an allele or genotype to the gene pool of subsequent generations as compared to that of other alleles or genotypes