Older adults are most likely to develop shingles, which is why the shingles vaccine is recommended for people age 60 and older. Zostavax is currently the only vaccine approved by the Food and Drug Administration (FDA) to prevent shingles.
Polygenic traits are those traits that are controlled by more than one gene. Such traits may even be controlled by genes located on entirely different chromosomes. Human height, eye and hair color are examples of polygenic traits. Skin color is another polygenic trait for humans and a variety of other animals.
Polygenic inheritance is a characteristic that is controlled by more than one gene (poly means many). Environmental impact on height in humans. An organismâs final appearance (phenotype) is a result of the interaction between the information held in its genotype and the effect of the environment acting on it during growth and development.