Co-dominance: Difference between revisions
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Co-dominance | Co-dominance can be considered to be [[Non-mendalian inheritance|non-mendalian inheritance]]. In co-dominance there is equal expression of two [[Alleles|alleles]] as the [[Phenotype|phenotype]]. If the individual is [[Heterozygous|heterozygous]] both alleles will be expressed equally<ref>Daniel L. Hartl and Elizabeth W. Jones, Genetics Analysis of genes and genomes, 7th Edition, Jones and Bartlett publishers pg 80, pg 712</ref>. An example of this would be the [[AB blood group|AB blood group]]. The [[Genotype|genotypes]] for the A and B [[Antigen|antigens]] are codominant with each other and dominant over the recessive antigen O. This means that the red blood cells will present both A antigens and B antigens on its [[Cell|cell]] surface membrane. | ||
This is different to [[Incomplete dominance|incomplete dominance]], where the phenotype expressed by an individual is a mixture of both parent alleles. This happens as a result of the [[Dominant|dominant]] allele not being completely expressed over its [[Recessive|recessive]] | This is different to [[Incomplete dominance|incomplete dominance]], where the phenotype expressed by an individual is a mixture of both parent alleles. This happens as a result of the [[Dominant|dominant]] allele not being completely expressed over its [[Recessive|recessive]] counterpart. An example of this would be a red flower and white flower producing a progeny pink flower. | ||
=== References === | |||
<references /> | |||
Latest revision as of 20:32, 5 December 2017
Co-dominance can be considered to be non-mendalian inheritance. In co-dominance there is equal expression of two alleles as the phenotype. If the individual is heterozygous both alleles will be expressed equally[1]. An example of this would be the AB blood group. The genotypes for the A and B antigens are codominant with each other and dominant over the recessive antigen O. This means that the red blood cells will present both A antigens and B antigens on its cell surface membrane.
This is different to incomplete dominance, where the phenotype expressed by an individual is a mixture of both parent alleles. This happens as a result of the dominant allele not being completely expressed over its recessive counterpart. An example of this would be a red flower and white flower producing a progeny pink flower.
References
- ↑ Daniel L. Hartl and Elizabeth W. Jones, Genetics Analysis of genes and genomes, 7th Edition, Jones and Bartlett publishers pg 80, pg 712