Table of Contents
What is it called when multiple genes control a trait?
Polygenic Trait = A polygenic trait is one whose phenotype is influenced by more than one gene. Traits that display a continuous distribution, such as height or skin color, are polygenic.
What type of inheritance is determined by multiple genes?
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).
What is a trait controlled by genes?
Genetic characteristics are inherited as genes — molecules of DNA that carry the information for each characteristic. A phenotypic characteristic can be controlled by various forms of one gene, such as for freckles, or can be controlled by various forms of multiple genes working together, such as for skin color.
What happens when more than one gene controls a trait?
Polygenic inheritance occurs when more than one gene controls the trait. *Alleles refer to different versions of the same gene. So a single gene can have multiple alleles.
Which is an example of a polygenic inheritance?
Human blood types (ABO) are an example of multiple alleles. Polygenic inheritance occurs when more than one gene controls the trait. *Alleles refer to different versions of the same gene. So a single gene can have multiple alleles.
Which is an example of multiple alleles in a trait?
*Multiple alleles occur when there are more than two different alleles for a trait. Human blood types (ABO) are an example of multiple alleles. Polygenic inheritance occurs when more than one gene controls the trait. *Alleles refer to different versions of the same gene. So a single gene can have multiple alleles.
Are there any genes that are recessive or dominant?
Describe the inheritance pattern for a single-gene autosomal dominant trait, such as free-hanging earlobes. Genes come in versions known as alleles. There are dominant alleles and recessive alleles and ear lobe attachment is thought to be a recessive trait. This means that;