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.
A homozygous individual carries two identical alleles for a specific gene. This often leads to a consistent expression of the trait controlled by that gene. Homozygosity can have different impacts depending on whether the alleles are dominant or recessive.
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.
Having two similar alleles for a trait is called being homozygous. It is possible to be homozygous for a dominant or recessive trait.
No, often many other alleles will also determine the same trait. For example, many alleles put together will determine a person's skin color.
The alleles for a given trait are inherited from an individual's parents.
The alleles for a given trait are inherited from an individual's parents.
No, alleles for a trait can be the same (homozygous) or different (heterozygous) in an individual.
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.
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.
Hetrozygous
A heterozygous is a hybrid of genes. It has a dominant and recessive gene. The dominant gene covers over the recessive trait, making the individual have the dominant trait. (trait are alleles...) or apex ans:two
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.
An organism has two alleles for one trait. If the two alleles are the same, the individual is homozygous for that trait, and if they are different, the individual is heterozygous.
If an individual possesses two identical alleles for a particular trait, they are said to be homozygous. This means that the alleles are the same and there is no variation for that trait.
A single-gene trait is a phenotypic trait controlled by two homologous alleles.