<P> Polygenic inheritance occurs when one characteristic is controlled by two or more genes . Often the genes are large in quantity but small in effect . Examples of human polygenic inheritance are height , skin color , eye color and weight . Polygenes exist in other organisms , as well . Drosophila , for instance , display polygeny with traits such as wing morphology , bristle count ( 20170808 dead link ) and many others . </P>
in human beings multiple genes are involved in the inheritance of
height skin color eye color weight