With the help of one example explain co dominance and multiple allelism in population ?
Answers
ABO blood group in human being is an example of multiple allelism.
There alleles for the gene I i.e. IA,IB,i.
When IA and IB are present together the blood group is AB.
Both A and B. are expressed and is called codominance.
Detailed Answer
ABO blood grapes in human population is an example of multiple allelism and codominance. There are three alleles of gene l, i.e., IA,IB and i. thus exhibiting multiple alIelism. Out of these three alleles any two alleles may occur in human being, one alleles is contributed from each parent.
The alleles IA + IB are dominant over allele i and produce A and B phenotypes respectively. But however when alleles IA and IB are present together both of them express equally and independently producing AB phenotype. This is a phenomenon called codominance.
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Answer:
when 2 alleles for a trait are equally expressed with neither being recessive or dominant, its called co-dominance.
Explanation:
In human, we have ABO blood group which are controlled by gene I. The gene I has there alleles IA, IB and i. IA and IB are completely dominant over i, in other words when IA and i are present only IA will be shown and when IB and i are present IB will be shown. But in case of IA and IB are present both will be shown, this is because of co-dominance.