What is codominance?
What is an example?
How does the ABO system work?
If there are three alleles in the ABO system, how many genotypes are produced and how many are heterozygotes and how many are homozygotes?
Codominance is the expression of both alleles of a heterozygote.
An example of codominance is the ABO example seen in the human ABO blood groups, where there is a codominance of antigen alleles.
There are three alleles that lead to four blood types of the ABO system.
There are six genotypes with three homo- and three heterozygotes.