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Inheritance of quantitative traits or polygenic inheritance refers to the inheritance of a phenotypic characteristic that varies in degree and can be attributed to the interactions between two or more genes and their environment. Though not necessarily genes themselves, quantitative trait loci (QTLs) are stretches of DNA that are closely linked to the genes that underlie the trait in question. QTLs can be molecularly identified (for example, with PCR) to help map regions of the genome that contain genes involved in specifying a quantitative trait. This can be an early step in identifying and sequencing these genes http://en.wikipedia.org/wiki/Polygenic_inheritance
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What is it called when the phenotype is determined by more than two unlinked loci?
When the phenotype is determined by more than two unlinked loci, it is referred to as polygenic inheritance. This means that multiple genes at different loci contribute to the expression of a particular trait or phenotype.
A characteristic of an organism that is determined by many genes?
The terms used to describe a number of genes on separate loci on the same chromosome (or another chromosome) which together determine a single phenotypic trait are polygene, multiple factor, multiple gene inheritance or quantitative gene.
How many alleles for one trait can an individual have?
An individual can have a maximum of two alleles for one trait, as they inherit one allele from each parent. These alleles can be the same (homozygous) or different (heterozygous) for a specific trait.
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.
If 675 plants resulting from the cross display a trait controlled by a dominant allele how many plants will show the trait controlled by the recessive allele?
In a gene loci there can be four combinations of 2 alleles. Suppose these possible allele combinations are called D for dominant and R for Recessive. The possible combinations for two of them are DD, DR, RD and RR. Wherever the D occurs the dominant trait will be displayed. There is only 1 where the recessive trait is displayed and this is the last or RR case. There must be 3 times the number of cases of the dominant trait as the recessive so the recessive trait is displayed in 675 / 3 cases or 225
What has the author Malcolm James Burns written?
Malcolm James Burns has written: 'Quantitative trait loci mapping in Arabidopsis'
What is quantitative traits?
a quantitative trait is a trait for a solution that involves numbers. such as: density, melting point or boiling point. :)
What is it called when the phenotype is determined by more than two unlinked loci?
When the phenotype is determined by more than two unlinked loci, it is referred to as polygenic inheritance. This means that multiple genes at different loci contribute to the expression of a particular trait or phenotype.
How do you calculate probable number of genes involved in polygenes?
The probable number of genes involved in polygenes can be calculated using statistical methods such as quantitative trait loci (QTL) mapping or genome-wide association studies (GWAS). These methods analyze the genetic variations and their effects on a particular trait to estimate the number of genes contributing to its polygenic nature. The specific number of genes involved can vary depending on the complexity of the trait and the techniques used for analysis.
An organism is heterozygous at two genetic loci on different chromosomes?
Two different alleles for a trait.
Variation in shoe size among humans is due to a trait that is necessarily?
quantitative
What are the 4 loci's?
There are infinitely many loci. So the answer depends on which 4 locis you mean.Incidentally, it should not be "loci's" which means belong to the loci.
A characteristic of an organism that is determined by many genes?
The terms used to describe a number of genes on separate loci on the same chromosome (or another chromosome) which together determine a single phenotypic trait are polygene, multiple factor, multiple gene inheritance or quantitative gene.
What are examples for the word allele?
The term allele is often used interchangeably with the word gene. Allele/gene is used for the variations seen at each gene locus for a trait on the homologous chromosome pair. For example: If there are three alleles for a trait only two of the alleles will be represented in the genotype of any one individual. The alleles for basic blood types A, B and O are examples. In general the term allele is not used interchangeably with gene in conjunction with the terms locus or loci..therefore Gene locus or gene loci but not allele locus or allele loci.
Is skin color a quantitative trait?
It is indeed. Quantitative traits suggest that the traits are polygenic, which means that the trait is influenced by more than one gene and skin color is influenced by 3 genes (6 alleles). Skin color is also a multifactorial trait because there are also many environmental factors that change skin color, such as exposure to sunlight.
What type of gene expression typically generates a continuum of varying phenotypes?
Quantitative trait loci (QTL) typically generate a continuum of varying phenotypes through polygenic inheritance, where multiple genes contribute to a single trait. This type of gene expression results in a range of phenotypic outcomes due to the additive effects of alleles, environmental influences, and interactions among genes. Traits like height, skin color, and intelligence often exhibit this continuous variation rather than discrete categories.
What does chromosomal loci mean?
Chromosomal Loci is a Heterozygous
