Final answer:
Parents with IA, IB, i, and i alleles can produce children with each of the four possible blood types (A, B, AB, O), each having an equal 25% chance of occurrence.
Step-by-step explanation:
The ABO blood groups in humans are controlled by three alleles known as IA, IB, and i. The alleles IA and IB are both dominant over the allele i, and when present together, IA and IB express a codominant relationship, meaning both are fully expressed.
Given parent alleles IA, IB, i, i, children can inherit the following combinations: IAi (Type A), IBi (Type B), IAIB (Type AB), or ii (Type O). Therefore, the expected outcome for blood type among children of these parents would be a 25% chance for each blood type: Type A, Type B, Type AB, and Type O.
The ABO blood groups in humans are controlled by multiple alleles: IA, IB, and i. If a heterozygous blood type A parent (IAi) and a heterozygous blood type B parent (IBi) mate, one quarter of their offspring will have AB blood type (IAIB), in which both A and B antigens are expressed equally. In this cross, the expected outcome for blood type among their children will be:
25% AB blood type (IAIB)
25% A blood type (IAi)
25% B blood type (IBi)
25% O blood type (ii)