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Gene and Environment

Classes Of Human Genetic Phenotypes, Gene-environment Interaction In Phenylketonuria, Methods For Identifying Gene-environment Interactions

Questions of "nature versus nurture" have been asked of most human traits: Is it our genes, inherited from our parents, that make us the way we are, or is it the environment in which we live? A phenotype is a trait that can be observed and described in a population. Although some phenotypes may be totally controlled by genetic or environmental factors, most are influenced by a complex combination of the two. Genes and environmental factors may work independently, or they may interact with one another to cause the phenotype.

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Medicine EncyclopediaGenetics in Medicine - Part 2