Polygenic inheritance, also known as multiple gene inheritance or multiple factor inheritance, is defined as inheritance where multiple independent genes have an additive or similar effect on a single quantitative trait.
Height is a polygenic trait which is controlled by at least three genes with six alleles.
Polygenic inheritance shows continuous variation.
There is no distinct alternative like tall and short, rather there is a whole range of possible heights.
Environment in which the person grows also influences polygenic inheritance such as health, nutrition, etc.
More than 400 genes are linked to variation in height.