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The answer is polygenic traits. Polygenic traits are determined by an interaction of multiple genes. As the name suggests, poly (Greek) means many, thus, polygenic means many genes. Many genes interact and together influence some phenotypic trait. Quantitative phenotypes are usually attributed to the polygenic effects.
Some traits are determined by the combined effect of more than one pair of genes. These are referred to as polygenic, or continuous, traits. An example of this is human stature. The combined size of all of the body parts from head to foot determines the height of an individual.There is an additive effect.hese are referred to as polygenic, or continuous, traits. An example of this is human stature. The combined size of all of the body parts from head to foot determines the height of an individual. There is an additive effect.