A genetic mode in which both genes can express and produce gene products independently when one allele is in heterozygous state
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There is no difference between dominant and recessive alleles. In the heterozygous state, the role of both genes can be expressed and produce gene products independently.The formation of corresponding phenotypes is called codominance inheritance.ABO blood groupIt can be used as an example of codominant inheritance.[1]
Chinese name
Codominant inheritance
Foreign name
codominance
Citation explanation
ABO blood groupThe gene of has been located at 9q4.2 on chromosome 9, which is composed of A, B and O genesMultiple allele。Gene A is dominant to gene O.Gene B is also dominant to gene O, and gene A and gene B are co dominant.Genotype AA and AO both determine the production of erythrocyte membrane organic antigen A. This individual is type A blood. Genotype BB and BO both determine the production of erythrocyte membrane antigen B. This individual is type B blood. Genotype OO only produces substance H without producing antigen A and B. This individual is type O blood. Genotype AB determines that there are antigen A and antigen B on the erythrocyte membrane, so it is type AB blood,It is codominant inheritance.
