Frequent question: When multiple alleles affect a single phenotypic trait is called?

When multiple alleles influence one trait it is called?

Explanation: A trait that is controlled by more than one gene is called polygenic which translates to “multiple genes”. The genes work together to make one trait. Examples are skin, eye and hair color. Important.

When multiple genes affect a single phenotypic trait?

Polygenic inheritance, in simple terms, implies a character or phenotypic trait, which is regulated by more than one gene. In biology, it refers to the quantitative inheritance wherein two or more independent genes additively affect a single phenotypic trait.

When a single allele affects multiple phenotypes it is called?

Today, we know that Mendel’s observations were the result of pleiotropy, or the phenomenon in which a single gene contributes to multiple phenotypic traits.

What is a trait with multiple alleles?

Traits controlled by a single gene with more than two alleles are called multiple allele traits. An example is ABO blood type. Your blood type refers to which of certain proteins called antigens are found on your red blood cells.

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What is an example of a trait that is determined by multiple alleles?

The best characterized example of multiple alleles in humans is the ABO blood groups, discussed in the Non-Mendelian Inheritance concept. Other human traits determined by multiple alleles would be hair color, hair texture, eye color, built, physical structures, etc.

Which term describes multiple genes affecting the phenotype of one 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 is it called when two separate genes contribute to one phenotype?

Any time two different genes contribute to a single phenotype and their effects are not merely additive, those genes are said to be epistatic.

When more than one phenotype is influenced by the same gene then dominance?

“Dominance is not an autonomous feature of a gene in case more than one phenotype is influence by the same gene.” Dominance is not an autonomous feature of a gene in case more than one phenotype is influence by the same gene.

What pleiotropy means?

genetics. : the phenomenon of a single gene influencing two or more distinct phenotypic traits : the quality or state of being pleiotropic In genetics, there’s a concept called pleiotropy, which posits that a single gene can influence multiple traits. [

What is expressivity and penetrance?

Penetrance is used to describe whether or not there is a clinical expression of the genotype in the individual. Expressivity is the term that describes the differences observed in the clinical phenotype between two individuals with the same genotype.

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When a single gene has multiple downstream effects it is called?

Pleiotropy is a phenomenon increasingly recognized by the usage of hypothesis-free exome sequencing rather than candidate gene approaches to identify novel disease genes. It refers to the effect that mutations in one and the same gene may lead to multiple, seemingly unrelated diseases.