PATHOLOGY

Detailed explanation-1: -A polygenic trait is a characteristic, such as height or skin color, that is influenced by two or more genes. Because multiple genes are involved, polygenic traits do not follow the patterns of Mendelian inheritance . Many polygenic traits are also influenced by the environment and are called multifactorial.

Detailed explanation-2: -phenotype, all the observable characteristics of an organism that result from the interaction of its genotype (total genetic inheritance) with the environment.

Detailed explanation-3: -In polygenic inheritance, traits are determined by multiple genes, or polygenes. Polygenic traits may express several different phenotypes, or displayed characteristics. Polygenic inheritance is a type of incomplete dominance inheritance, where the expressed phenotypes are a mixture of inherited traits.

Detailed explanation-4: -In humans, height, skin color, hair color, and eye color are examples of polygenic traits. Type-2 diabetes, coronary heart disease, cancer, and arthritis are also deemed polygenic.

Detailed explanation-5: -Polygenic trait: also called quantitative or complex trait, a polygenic trait is determined by several genes and/or regulatory loci.