Polygenes exhibit

The correct option is Different phenotypes.

Polygenic inheritance refers to the determination of a single phenotypic trait by the cumulative effect of multiple genes, known as polygenes. Unlike qualitative traits controlled by a single gene (monogenic inheritance) which show distinct categories, polygenic traits exhibit continuous variation.

Because these traits are controlled by several genes, each having multiple alleles that contribute a small, additive effect to the final outcome, a large number of genetic combinations are possible. This results in a wide range of different phenotypes within a population, rather than clear-cut, discrete classes. Examples of polygenic inheritance include skin pigmentation, height, and intelligence in humans, all of which display a continuous spectrum of phenotypic variation.