What is the scientific definition of polygenic?
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.
What is a polygenic trait what controls it?
Polygenic trait refers to a trait that is controlled by multiple non-allelic genes. These genes are called polygenes. They are a group of genes that, when turned on, are expressed as a unit.
What is polygenic and examples?
Polygenic traits have a bell-shaped distribution in a population with most individuals inheriting various combinations of alleles and falling within the middle range of the curve for a particular trait. Examples of polygenic traits include skin color, eye color, hair color, body shape, height, and weight.
What is an example of polygenic inheritance?
Some examples of polygenic inheritance are: human skin and eye color; height, weight and inteligence in people; and kernel color of wheat. In fact, kernel color in wheat is nicely shown in Table 2.
What does polygenic mean quizlet?
a trait that is controlled by several pairs of genes; different combinations of all the genes contribute to the trait in varying degrees.
What is a polygenic trait quizlet?
How do polygenic genes work?
Polygenic traits are traits that are controlled by multiple genes instead of just one. The genes that control them may be located near each other or even on separate chromosomes. Because multiple genes are involved, polygenic traits do not follow Mendel’s pattern of inheritance.
What is polygenic inheritance quizlet?
Polygenic inheritance refers to a single characteristic that is controlled by more than two genes (also called multifactorial inheritance)
What controls polygenic traits quizlet?
Most genetic characteristics or traits are controlled by many genes. – Polygenic traits are controlled by more than 1 gene. – Each gene plays a small role in the expression of the trait.
What is polygenic inheritance in biology quizlet?
How is polygenic inheritance defined?
“Polygenic inheritance is defined as quantitative inheritance, where multiple independent genes have an additive or similar effect on a single quantitative trait.” Polygenic inheritance is also known as multiple gene inheritance or multiple factor inheritance.
What is polygenic variation?
Continuous variation Most characteristics are controlled by more than one gene and are described as being polygenic . Polygenic characteristics have phenotypes that can show a wide range of values, with each value following on from the value before. This is described as continuous variation .
Which trait shows a polygenic method of inheritance quizlet?
It is a trait that is controlled by more than one gene. Such a trait may even be controlled by genes located on entirely different chromosomes. Human height, eye and hair color are examples of this.
Which are human traits determined by polygenic inheritance quizlet?
Human height, eye color, and hair color are examples of traits determined by polygenic inheritance.
What is a polygenic effect quizlet?
Polygenic inheritance is when two or more genes effect the expression of one trait. Explain that polygenic inheritance can contribute to continuous variation. When one gene controls the expressions of a trait, number of phenotypes expressed is limited to dominant or recessive phenotype.
How is polygenic inheritance defined quizlet?
Define polygenic inheritance. Polygenic inheritance is when two or more genes effect the expression of one trait. Explain that polygenic inheritance can contribute to continuous variation. When one gene controls the expressions of a trait, number of phenotypes expressed is limited to dominant or recessive phenotype.