Dictionary » C » Codominance




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.

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genetic phenotype

... as dominant and dwarf as recessive the if the heterozygous is tall the tall is dominant and is the heterozygous is not tall and dwarf it is codominance.So i dont think reading the dna sequence changes anything.

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by gauthum
Sun Dec 09, 2012 4:19 pm
Forum: Genetics
Topic: genetic phenotype
Replies: 1
Views: 2967

Mendel's law

2. what comes to my mind - mitochondrial/plastidial genome, incomplete dominance, codominance etc.

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by JackBean
Mon Nov 05, 2012 12:11 pm
Forum: Genetics
Topic: Mendel's law
Replies: 2
Views: 4581

Genetic Crosses

JackBean is right. It's 2 types because F1 is heterozygous and only 1 locus is involved. The interaction is codominance. There is no "black" and no "white" in nature. So "white" is probably = no pigment and "back" = a lot of pigment to ...

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by Cat
Fri Oct 21, 2011 12:12 am
Forum: Genetics
Topic: Genetic Crosses
Replies: 3
Views: 6268

Genetic Crosses

... and internet but Im still not sure how to do this problem. What confuses me the most is that since P1 are either black or white, that, if it was codominance, F1 would be grey not red, as stated in the problem. Why would it be red? Because of this Im not sure how to write the genotype for these. ...

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by martini
Wed Oct 19, 2011 4:12 am
Forum: Genetics
Topic: Genetic Crosses
Replies: 3
Views: 6268

Re: Campbell and Reece 8th edition

... the dominant is expressed? if an allele gives a partially functional protein just like what you have said before then do we have a situation of codominance and incomplete dominance??? thank you again

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by Stephen1993
Fri Apr 29, 2011 1:05 pm
Forum: Cell Biology
Topic: Campbell and Reece 8th edition
Replies: 36
Views: 30334
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