As stated, the alleles A and B are codominant to allele O. This means that the individual will not have the O blood type when it is accompanied by the other alleles. But also, since this is a recessive allele, a pair could have an offspring with the blood type O even if none of these individuals have it.
A, B, ad O blood type in humans is controlled by a single gene with three alleles: IA (or A), IB (orB), and i (or O). Type O is the recessive trait. The i (O) allele is recessive to both IA (or A), and IB (orB). Which of the following could be possible genotypes of the parents ofa person with type O blood?
A. IAi (AO) and IAIA (AA)
B. IAi (AO) and IBi (BO)
C. IAIB (AB) and IAi (AO)
D. IAIB (AB) and ii (OO)
E. All of the above are possible
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Extensions to Mendel concept. You can view video lessons to learn Extensions to Mendel. Or if you need more Extensions to Mendel practice, you can also practice Extensions to Mendel practice problems.