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Multiple gene or polygenic inheritance occurs when two or more genes code for a single trait?
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∙ 14y ago
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Why is there a wide range of phenotypes in polygenic inheritance?
Polygenic inheritance occurs when multiple genes contribute to a single trait. The wide range of phenotypes arises because each gene can have different variations (alleles), and the combination of these variations leads to a diversity of phenotypic outcomes. Additionally, environmental factors can also influence the expression of these genes, further increasing the variability in phenotypes.
What is it called when three or more contrasting genes control a trait?
When three or more contrasting genes control a trait, it is called polygenic inheritance. This type of inheritance involves multiple genes interacting to influence a single trait, resulting in a continuous distribution of phenotypes in a population.
What is id polygenic inheritance?
Polygenic inheritance is when a trait is influenced by the combined effects of multiple genes, rather than being determined by a single gene. Each gene may have a small additive effect on the phenotype, resulting in a continuous range of phenotypic variations. This type of inheritance is often seen in traits like height, skin color, and intelligence.
What is the opposite of pleiotropy?
The opposite of pleiotropy is "monogenic" or "simple genetic inheritance," where a single gene controls only one specific trait or function in an organism. In contrast, pleiotropy refers to a situation where a single gene influences multiple, seemingly unrelated phenotypic traits.
What is the difference between alleles and multiple alleles?
Alleles refer to different versions of the same gene. So a single gene can have multiple alleles. For example in fruit flies there is a single gene that controls eye color, and the eye color of the fly depends on the alleles they have for that gene (since they have two copies of every gene, being diploid). A polygenic trait refers to any inheritable trait that is controlled by multiple genes, and each of these genes can have multiple alleles. For example, eye color in humans is a polygenic trait. There are at least three different genes, each with multiple alleles, that determine eye color in humans. Polygenic traits don't follow patterns of mendelian inheritance. So in summation the difference is multiple alleles refers to different versions of one gene and polygenic traits refers to a single trait which is controlled by multiple genes (each with multiple alleles) Yes, or: Multiple alleles are "the existence of more than two alleles (versions of the gene) for a genetic traits. Polygenic traits are "[characteristics of organisms that are] influenced by several genes." So multiple alleles are more than two alleles for one trait, and polygenic traits are one trait that is influenced by multiple genes. This information came from my biology textbook, "Biology: Principles and Explorations" by Holt, Rinehart, and Winston.
How is pleiotropy different from polygenic inheritance?
Pleiotropy occurs when a single gene influences multiple traits or characteristics, while polygenic inheritance involves the combined effect of multiple genes on a single trait or characteristic. Pleiotropy involves one gene affecting many aspects of an organism's phenotype, whereas polygenic inheritance involves many genes contributing to one aspect of an organism's phenotype.
Define and distinguish between pleiotropy and polygenic inheritance?
Pleiotropy occurs when a single gene influences multiple, seemingly unrelated traits or phenotypes. Polygenic inheritance, on the other hand, involves the combined effect of multiple genes on a single trait. In pleiotropy, one gene has multiple effects, whereas in polygenic inheritance, multiple genes each have a small additive effect on a trait.
What occurs when a group of gene pairs acts together to produce a single trait?
Polygenic Inheritance
What is the difference between pleiotropy and polygenic inheritance?
Pleiotropy refers to a single gene influencing multiple phenotypic traits, while polygenic inheritance involves multiple genes contributing to a single trait. Pleiotropy can lead to diverse phenotypic effects, while polygenic traits are often influenced by the additive effects of multiple genes.
What occurs when a group of gene pairs act together to produce a single trait?
Polygenic Inheritance
Why is there a wide range of phenotypes in polygenic inheritance?
Polygenic inheritance occurs when multiple genes contribute to a single trait. The wide range of phenotypes arises because each gene can have different variations (alleles), and the combination of these variations leads to a diversity of phenotypic outcomes. Additionally, environmental factors can also influence the expression of these genes, further increasing the variability in phenotypes.
How is inheritance be multiple alleles and poly genic inheritance similar?
Both multiple alleles and polygenic inheritance involve the contribution of multiple genes to a trait. In multiple allele inheritance, there are more than two possible alleles for a gene, while in polygenic inheritance, multiple genes contribute to a single trait. Both types of inheritance result in a wider range of phenotypic variations.
How inheritance by multiple alleles and polygenic inheritence are similar?
In both cases, traits are influenced by multiple genetic factors. Inheritance by multiple alleles involves the presence of more than two alleles for a particular gene, while polygenic inheritance involves the contribution of multiple genes to a single trait. Both types of inheritance result in continuous variation, with traits being influenced by the interaction of multiple genetic factors.
When a trait has more than two alleles how is the trait inherited?
When a trait has more than two alleles, it can be inherited in various ways depending on the interaction of the alleles. Multiple alleles can exist at a single genetic locus, and the specific inheritance pattern is determined by factors like dominance, recessiveness, and co-dominance. Each individual can still only inherit two alleles for a specific gene, but the presence of multiple alleles can create a wider range of possible genotypes and phenotypes.
When a single trait is affected by more than one gene locus this called?
This is called polygenic inheritance. Multiple genes contribute to the expression of a single trait in polygenic inheritance, resulting in a continuum of phenotypic variation. Traits like height, skin color, and intelligence are influenced by multiple gene loci.
What is it called when three or more contrasting genes control a trait?
When three or more contrasting genes control a trait, it is called polygenic inheritance. This type of inheritance involves multiple genes interacting to influence a single trait, resulting in a continuous distribution of phenotypes in a population.
What is id polygenic inheritance?
Polygenic inheritance is when a trait is influenced by the combined effects of multiple genes, rather than being determined by a single gene. Each gene may have a small additive effect on the phenotype, resulting in a continuous range of phenotypic variations. This type of inheritance is often seen in traits like height, skin color, and intelligence.
