Question

A wide range of phenotypic variations exist for the trait of human height and the trait of human skin color. which of the factors listed above account for the variation shown in the phenotypes of these traits? i. multiple alleles ii. environmental effects iii. codominance iv. polygenic inheritance

Answer 1

The trait of human height and the trait of human skin colour are an example of polygenic inheritance. Polygenic or quantitative inheritance means that the trait is not controlled by one gene but rather, by many genes. Each of these multiple genes makes a small contribution to the overall outcome of the phenotype.