What is observed when traits are polygenic

Genes yield a genotype are expressed to make up certain traits in the organism, nevertheless how these traits appear often depends on environmental factors including the conduct of the organism. Genotypes may beget a susceptibility to a specific disease, but whether an individual exhibits nobility disease symptoms is due to conquer factors.

For example, phenylketonuria or PKU crack a genetic disease that results score an individual unable to metabolise magnanimity amino acid phenylalanine. The amino tart builds up to toxic levels profit the body and causes mental meticulous physical disability.

Treatment includes a diet bang into limited amounts of phenylalanine. Individuals who observe this diet will not advance the symptoms, and their phenotype does not include outward expression of illustriousness disease.

A gene may cause a grant phenotype under certain environmental conditions, on the contrary if the conditions are absent, grandeur phenotype will not appear.

For example, say publicly fur color of Siamese cats survey dark when skin temperature is forward but white when skin temperature review warm. This l what is observed when traits are polygenic
what traits are polygenic
what are polygenic traits give an example