A condition in which the alleles of a gene pair in a heterozygote are fully expressed thereby resulting in offspring with a phenotype that is neither dominant nor recessive.


A typical example showing codominance is the ABO blood group system. For instance, a person having A allele and B allele will have a blood type AB because both the A and B alleles are codominant with each other.

Compare: complete dominance, incomplete dominance.
See also: allele.

Please contribute to this project, if you have more information about this term feel free to edit this page

This page was last modified on 20 June 2008, at 11:08. This page has been accessed 386,860 times. 
What links here | Related changes | Permanent link