Monohybrid Cross Problem Set

What are the possible blood types of the offspring of a cross between individuals that are type AB and type O? (Hint: blood type O is recessive)

In this problem (in contrast to problem 11), there is no uncertainty about the genotype of either parent. A parent of blood type AB has the codominant I^A and I^B alleles. A parent of blood type O is homozygous recessive for the i allele.
The Punnett square for their offspring is shown to the right. The genotypes of their offspring could be either I^Ai or I^Bi. Their children could be in blood groups A or B, but not AB or O. For more information on blood types inheritance go to our Blood Types Tutorial within the Human Biology Section of The Biology Project.