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.
Traits, Phenotypes, and Genotypes. To help understand polygenic traits, explanation of traits, phenotypes, and genotypes is necessary. A trait is any feature of an organism, such as eye color.A phenotype is the set of an organism’s physical characteristics. For example, a person’s hair color, skin color, and eye color are all part of their phenotype.
Just like non-polygenic traits, polygenic traits also have recessive and dominant alleles. However, since several genes are involved in the phenotype, the final result is an amalgam of information which makes it difficult to impossible to tease out one gene’s impact on a polygenic trait. Polygenic Trait Examples
A polygenic trait refers to any inheritable trait that iscontrolled by multiple genes, and each of these genes can havemultiple alleles. For example, eye color in humans is a polygenictrait.
Many traits are polygenic. In humans, for example, height is polygenic (and also influenced by the environment). Weight is another polygenic trait which may be more strongly influenced by the environment in some circumstances.
If variety is the spice of life, polygenic inheritance is one genetic mechanism giving us a continuous range of possibilities. In this lesson, learn how a polygenic trait, like height, can be ...
Using a simplified example of a polygenetic trait controlled by only three genes, this becomes easier to visualize. Examples of Polygenic Inheritance Skin Color. The pigment melanin is responsible for dark coloration in the skin and there are at least three genes, which control for human skin color.
Polygenic Traits: Definition & Examples If variety is the spice of life, polygenic inheritance is one genetic mechanism giving us a continuous range of possibilities. In this lesson, learn how a polygenic trait, like height, can be controlled by multiple genes.
Examples of human polygenic inheritance are height, skin color, eye color and weight. Polygenes exist in other organisms, as well. Drosophila, for instance, display polygeny with traits such as wing morphology, bristle count (20170808 dead link) and many others. Trait distribution
Examples of polygenic inheritance are eye color, skin color, hair color, flower color, shape of the body and height and weight. On the basis of the above information, B) birth weight in calves and eye color in humans and D) flower color in snapdragons and birth weight in calves are the examples of polygenic traits.