Final answer:
Traits determined by more than one pair of genes are called polygenic traits. They are influenced by multiple genes and can have multiple effects, exhibit a wide range of variation, and can include traits like height and skin color.
Step-by-step explanation:
Some traits we see are determined by more than one pair of genes; such traits are called polygenic traits. Polygenic traits result from the combined effect of more than one gene and each of these genes may have multiple alleles. Examples of polygenic inheritance include characteristics such as height, skin color, and weight, which can all be measured and show wide variability in the population.
Polygenic characteristics are not limited to a single gene with two alleles, but they rather involve multiple genes on the same or on nonhomologous chromosomes. They are an example of non-Mendelian inheritance, which is more complex than the Mendelian scenario where traits are controlled by one gene with two alleles and complete dominance.