A) the gene is solely responsible for the development of that behavior.
B) individuals with different forms of that gene exhibit different behaviors.
C) the role of the environment in affecting the development of the behavior is relatively small.
D) the behavior is unlikely to respond to selection, since there is no variation in the species.

A) No, because the development of every phenotype requires more than genetic information.
B) No, because adaptations are only revealed when individuals interact with the environment.
C) No, because half of every phenotype is composed of genes, while the other half is environmental.
D) Yes, because only hereditary traits can enable an individual to adapt to changing conditions.

A) No, because both genetic and environmental factors are necessary for development of every phenotype.
B) No, because this is equivalent to saying that the two traits are environmentally determined, which is incorrect.
C) Yes, because as polyphenisms illustrate, some differences in gene-environment interactions are caused only by differences in the environment side of the interaction.
D) Yes, because the environment is absolutely essential for the development of every phenotype, especially behavioral ones.