AP BIOLOGY

Detailed explanation-1: -Usually, traits are polygenic when there is wide variation in the trait. For example, humans can be many different sizes. Height is a polygenic trait, controlled by at least three genes with six alleles. If you are dominant for all of the alleles for height, then you will be very tall.

Detailed explanation-2: -Polygenic inheritance is the inheritance of traits or characters influenced by multiple genes. Polygenic inheritance involves the governance of three genes. The trait height is an example of a polygenic trait that is controlled by at least 3 genes. Individual height varies and has a wide range of possibilities.

Detailed explanation-3: -Three examples of polygenic traits in humans are height, skin colour and eye colour. These traits are governed by multiple genes.

Detailed explanation-4: -Human phenotypes such as hair color, eye color, height, and weight are examples of polygenic traits. Complex diseases (e.g., cardiovascular diseases, Alzheimer’s, and Schizophrenia) also have a polygenic basis. Human hair color is an example of a polygenic trait.

Detailed explanation-5: -A complex inheritance pattern. How, then, is height inherited? Height and other similar features are controlled not just by one gene, but rather, by multiple (often many) genes that each make a small contribution to the overall outcome. This inheritance pattern is sometimes called polygenic inheritance (poly-= many).