Polygenic
 inheritance, also known as quantitative or multifactorial inheritance 
refers to inheritance of a phenotypic characteristic (trait) that is 
attributable to two or more genes and their interaction with the 
environment. Unlike monogenic traits, polygenic traits do not follow 
patterns of Mendelian inheritance (qualitative traits). Instead, their 
phenotypes typically vary along a continuous gradient depicted by a bell
 curve. 
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