Differences in observable traits, individuals.

(genetics) The ability of an organism with a given genotype to change its phenotype in response to changes in the environment, including changes that occur during the adult life of the organism.

Variability in traits among individuals.

Expression of sexual characteristics externally.

Adjustment of traits to environment.

(genetics) a delay in the expression of a phenotype acquired by mutation.

A phenotypic trait, simply trait, or character state is a distinct variant of a phenotypic characteristic of an organism; it may be either inherited or determined environmentally, but typically occurs as a combination of the two.