According to “The Genotype/Phenotype Distinction”, an articlefrom The Stanford Encyclopedia of Philosophy, genotype is defined as “somerelevant part of the DNA passed to the organism by its parents”. Meanwhile, the phenotype is described as “thephysical and behavioral traits of the organism”, such as height, weight, orpatterns of behaviors. In other words, the concept of phenotype canbe characterized as the combination of environment and its genotype.Considering the interaction between genotype and phenotype, we can withdrawsome questions about how they interact with each other and furthermore, howthey are connected with environmental factors. Theoretically, theenvironment can have a large effect on the genotype and phenotype of a specificorganism or population. Via Natural Selection, only specific genes will survivedepending on the changing of environment and what that population or organismmust endure. Those with the strongest genes, who are able to pass on theirgenetic material in the form of offspring, will survive.
So, in theory, aspecific genotype, whether expressed in the phenotype or not, that was oncepresent in a specific environment may become dominant or obsolete depending onits evolutionary importance and whether Natural Selection favors it. As for phenotype, the environment can cause an organism touse its phenotype to better protect itself. For example, in Mullerian mimicry,one species mimics that of another (usually two harmful ones) to prevent bothfrom being eaten/falling to predators. In this case, the environment hasallowed the animal/insect to use its phenotype (physical features) to protectitself and adapt where as in another environment, its colors could cause it toseriously fall victim to predators. If you need more information for the phenotype connectionwith the environment, please email or Instant message me.
If you want a directcorrelation for all three, you merely need to say that Natural Selection from aspecific environment (while describing as I did above) causes a specificgenotype to become favored. As the genotypes of an environment change, we cannaturally assume so will the phenotype.