Blood type is an example of both multiple alleles and codominance. And we can use it as an example of how both can be useful genetically.
Is blood type codominance?
The human ABO blood group system exhibits codominance. The system consists of three alleles A, B, and O. Both A and B are dominant in relation to O, and therefore blood group A can have the genotype AA or AO.
Is blood type O An example of codominance?
An example of codominance for a gene with multiple alleles is seen in the human ABO blood group system. … Persons with type AB blood have one allele for A and one for B; the O allele is recessive (its expression is masked by the other alleles).
Is blood type an example of incomplete dominance?
The ABO blood groups in humans are expressed as the IA, IB, and i alleles. The IA allele encodes the A blood group antigen, IB encodes B, and i encodes O. … Therefore, ABO blood groups are an example of: multiple alleles and incomplete dominance.
Why are blood types Examples of multiple alleles?
Because individuals have only two biological parents. We inherit half of our genes (alleles) from ma, & the other half from pa, so we end up with two alleles for every trait in our phenotype. An excellent example of multiple allele inheritance is human blood type.
What are the 3 blood alleles?
Human blood type is determined by codominant alleles. There are three different alleles, known as IA, IB, and i. The IA and IB alleles are co-dominant, and the i allele is recessive. The possible human phenotypes for blood group are type A, type B, type AB, and type O.
What are the alleles for type O blood?
Someone with blood type O has neither the A nor the B allele. The genotype must be OO.
How are codominant alleles written?
Codominance, is a situation in which both alleles are equally stong and both alleles are visible in the hybrid genotype. An example of codominance is found in chickens. … When expressing incomplete alleles, both alleles are written as superscipt capital letters placed above the letter “i”.
What are examples of codominant traits?
A trait resulting from an allele that is independently and equally expressed along with the other. An example of codominant trait is blood type, i.e. a person of blood type AB has one allele for blood type A and another for blood type B.