When there are multiple alleles present for a trait a variety of phenotypical outcomes is possible. These traits can be dominant, recessive, co-dominant, or incompletely dominant.
It depends on the trait. Some traits are controlled by several alleles. Some traits are simply one of many controlled by a single allele. It also depends and how you correlate the trait with the allele. Sometimes a completely unrelated allele can "turn on" or "turn off" other sets of alleles. This means that the number of alleles associated with a particular trait can ultimately be indeterminable by our current observational methods.
An example of a human trait caused by a single gene with multiple alleles is the ABO blood group system. This system is determined by the presence of different alleles at the ABO gene locus, specifically A, B, and O alleles. The combinations of these alleles result in four possible blood types: A, B, AB, and O, illustrating how multiple alleles can influence a single trait.
An organism that has two different alleles for a single trait is called heterozygous. This means that the organism inherited different versions of the gene responsible for that trait from each parent.
Polygenic traits result in more variation because so many more alleles are involved in the process of reproduction.
monohybrid cross
Alleles affect traits like eye color. Alleles for brown and blue eyes are dominant and recessive respectively. Individuals who have homozygous and heterozygous genotypes with the dominant allele will have brown eyes. However individuals are homozygous for the recessive allele will have blue eyes.
Genetic makeup formed from both inherited alleles together is called a genotype. Homozygous alleles would be a pair of identical alleles for a single trait. Heterozygous is different alleles for a single trait.
A polygenic trait is a trait in which multiple sets of alleles are used to determine the trait, whereas in a single gene trait aka. a Mendelian trait, only one pair of alleles is used.
This phenomenon is known as multiple allelism, where there are more than two different variations of a gene (alleles) that can affect a single trait. In this case, individuals can inherit one of several possible alleles for the trait. Examples include the ABO blood group system in humans, where there are three alleles (IA, IB, i) that determine a person's blood type.
alleles
A single-gene trait is a phenotypic trait controlled by two homologous alleles.
Yes, a single gene can affect many traits. this is called plieotropy
It depends on the trait. Some traits are controlled by several alleles. Some traits are simply one of many controlled by a single allele. It also depends and how you correlate the trait with the allele. Sometimes a completely unrelated allele can "turn on" or "turn off" other sets of alleles. This means that the number of alleles associated with a particular trait can ultimately be indeterminable by our current observational methods.
Genetic makeup formed from both inherited alleles together is called a genotype. Homozygous alleles would be a pair of identical alleles for a single trait. Heterozygous is different alleles for a single trait.
An example of a human trait caused by a single gene with multiple alleles is the ABO blood group system. This system is determined by the presence of different alleles at the ABO gene locus, specifically A, B, and O alleles. The combinations of these alleles result in four possible blood types: A, B, AB, and O, illustrating how multiple alleles can influence a single trait.
An organism that has two different alleles for a single trait is called heterozygous. This means that the organism inherited different versions of the gene responsible for that trait from each parent.
Polygenic traits result in more variation because so many more alleles are involved in the process of reproduction.