It is virtually impossible to locate the genetic factors involved in most psychological characteristics because of polygenic inheritance.
Multiple genes, or polygenes, generate features in polygenic inheritance. Numerous diverse phenotypes, or displayed qualities, may be expressed through polygenic traits. When phenotypes were expressed, a variety of inherited qualities are mixed together due to polygenic inheritance, a kind of incomplete dominant inheritance.
The phenotypic, such as the color of one's hair or skin, is produced by polygenes working together. Polygenic traits don't inherit in the same ways as Mendelian traits do. Multifactorial traits will be many polygenic qualities that have been additionally influenced through the environment.
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