What is the term used to describe a trait that is controlled by many genes quizlet?
What term describes a trait that is controlled by many genes? Polygenic.
What is the term a characteristic that is controlled by a gene?
A trait, as related to genetics, is a specific characteristic of an individual. Traits can be determined by genes, environmental factors or by a combination of both.
What traits are polygenic?
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.
Which is a phenotype?
Phenotype refers to an individual's observable traits, such as height, eye color and blood type. A person's phenotype is determined by both their genomic makeup (genotype) and environmental factors.
What is an epistasis trait?
Epistasis is the interaction between genes that influences a phenotype. Genes can either mask each other so that one is considered “dominant” or they can combine to produce a new trait. It is the conditional relationship between two genes that can determine a single phenotype of some traits.
What means allele?
An allele is one of two or more versions of DNA sequence (a single base or a segment of bases) at a given genomic location. An individual inherits two alleles, one from each parent, for any given genomic location where such variation exists. If the two alleles are the same, the individual is homozygous for that allele.
What traits are controlled by multiple genes?
Definition. 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.
Which of these traits is controlled by a gene 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….Multiple Allele Traits.
| Genotype | Phenotype (blood type) |
|---|---|
| IAIB | AB |
•May 13, 2020
What is the term genotype?
A genotype is a scoring of the type of variant present at a given location (i.e., a locus) in the genome. It can be represented by symbols. For example, BB, Bb, bb could be used to represent a given variant in a gene.
What traits are likely to be controlled by multiple genes?
Human features like height, eye color, and hair color come in lots of slightly different forms because they are controlled by many genes, each of which contributes some amount to the overall phenotype.
What is a phenotype and genotype?
A person's genotype is their unique sequence of DNA. More specifically, this term is used to refer to the two alleles a person has inherited for a particular gene. Phenotype is the detectable expression of this genotype – a patient's clinical presentation.
What is a multiple gene trait?
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 trait called when it is controlled?
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.
What is a multiple allele trait?
Multi-allele traits have more than two alleles at a population level, although individuals still only get one from each parent. These alleles may exhibit classic dominance, they may mask each other, they may add to or subtract from each other, or some combination of these effects.
What is a multiple allele?
Definition of multiple allele : an allele of a genetic locus having more than two allelic forms within a population.
What is the term homozygous?
(HOH-moh-ZY-gus JEE-noh-tipe) The presence of two identical alleles at a particular gene locus. A homozygous genotype may include two normal alleles or two alleles that have the same variant.
What is it called when a trait has more than two 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.
What is heterozygous and homozygous?
Homozygous and heterozygous are terms that are used to describe allele pairs. Individuals carrying two identical alleles (RR or rr) are known as homozygous. While individual organisms bearing different alleles (Rr) are known as heterozygous.
What is it called when one gene controls multiple characters?
Pleiotropy is the condition in which a single gene influences more than one trait.
What trait is controlled by multiple alleles?
ABO blood type 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….Multiple Allele Traits.
| Genotype | Phenotype (blood type) |
|---|---|
| IAIB | AB |
•May 13, 2020
What is a heterozygous trait?
The term “heterozygous” also refers to a pair of alleles. Unlike homozygous, being heterozygous means you have two different alleles. You inherited a different version from each parent. In a heterozygous genotype, the dominant allele overrules the recessive one. Therefore, the dominant trait will be expressed.
What is the term heterozygous?
Listen to pronunciation. (HEH-teh-roh-ZY-gus JEE-noh-tipe) The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).
What is multiple alleles in genetics?
Multiple alleles of a gene occupy the same locus on the chromosome. Multiple alleles are the alternative forms of the same gene so they influence the same trait. The wild-type allele is mostly dominant over the mutant alleles. The wild type is considered the standard and all other alleles are considered variants.
What is meant by epistasis?
Epistasis is a circumstance where the expression of one gene is modified (e.g., masked, inhibited or suppressed) by the expression of one or more other genes.
When a gene control two or more different traits it is called *?
Pleiotropy happens when one gene affects two or more professedly unrelated phenotypic features. Such a gene that manifests multiple phenotypic expression is called a pleiotropic gene.
What is it called when a gene has more than 2 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.
What is a homozygous trait?
Being homozygous for a particular gene means you inherited two identical versions. It's the opposite of a heterozygous genotype, where the alleles are different. People who have recessive traits, like blue eyes or red hair, are always homozygous for that gene.
What traits have 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 trait is normally controlled by multiple alleles?
The ABO blood group Which Trait Is Normally Controlled By Multiple Alleles But Not Multiple Genes? The ABO blood group in humans is a trait controlled by a single ABO gene with three types of alleles (multiple alleles) are seen.
What is meant by 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.