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Codominance

Biology  Coding strand  Codominant

In both codominance and incomplete dominance, both alleles for a trait are dominant. In codominance a heterozygous individual expresses both simultaneously without any blending.



is a relationship between two versions of a gene. Individuals receive one version of a gene, called an allele, from each parent.

Codominance
In this case, both alleles are dominant.
They are independent, so there is no 'blending' as in the snapdragons, instead the phenotype is a result of the full expression of both alleles.

Defined for pairs of alleles. The situation in which an animal heterozygous for two alleles (A1 and A2 at the A locus) expresses both of the phenotypes observed in the two corresponding homozygotes.

Codominance
The observation of a phenotype caused by independent expression of both alleles of a gene in a diploid.

A type of inheritance in which heterozygotes fully express both alleles.
codon A sequence of three nucleotides in messenger RNA that codes for a single amino acid.

Codominance and Multiple Alleles- Example: ABO blood group
Up to this point, we have discussed two possible alleles for any gene locus. For example, at the flower color locus, there is either the red or the white allele (A or a).


A phenotypic situation in which both alleles are expressed in the heterozygote.
codon ...

Codominance: Equal effect on the phenotype of two alleles of the same locus (as opposed to recessive and dominant).


Situation in which two different alleles for a genetic trait are both expressed.
See also: autosomal dominant, recessive gene
Codon ...

(40) Codominance [phenotype] (see also codominace)
(a) Codominance occurs when two alleles both express functional proteins ...


The property of an allele of a given gene, that can be setected in a heterozygote.
Related Terms:
Allele
The term coined by Bateson and Saunders (1902) for characters which are alternative to one another in Mendelian inheritance (Gk.

codominance A condition in which both alleles of a heterozygous pair are expressed independently.
codon A sequence of three bases on messenger RNA that specifies the position of an amino acid in a protein.

[cloning DNA] [cloning animals] Clonus Clostridia Clotting (coagulation) of blood CMA-676 Cnidaria Cocaine Cochlea Cockayne's syndrome The independent expression of each of two alleles in a heterozygote.

The ABO blood group is a good example of codominance and multiple alleles. There are three allele that control the ABO blood groups. If there are more than two allele of a gene then they are called multiple allele.

In another type of allelic relationship, termed , the heterozygote produces a phenotype that incorporates both phenotypes of the homozygotes.

The relative effects of two alleles range from complete dominance of one allele, through incomplete dominance of either allele, to codominance of both alleles.

Extended expression patterns seen in diploid organisms include facets of incomplete dominance, , and multiple alleles .
See also : genetics, skill
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See more about: Trait ...

of the organism, while the other allele is called recessive as its qualities recede and are not observed. Some alleles do not have complete dominance and instead have incomplete dominance by expressing an intermediate phenotype, or codominance by ...

See also: See also: Allele, Alleles, Chromosome, Gene, Express

Biology  Coding strand  Codominant

 
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