In humans, ABO blood types refer to glycoproteins in the membranes of red blood cells. There are three alleles for this autosoma
l gene: IA, IB, and i. The IA allele codes for the A glycoprotein, The IB allele codes for the B glycoprotein, and the i allele doesn't code for any membrane glycoprotein. IA and IB are codominant, and i is recessive to both IA and IB. People with type A blood have the genotypes IAIA or IAi, people with type B blood are IBIB or IBi, people with type AB blood are IAIB, and people with type O blood are ii. If a woman with type AB blood marries a man with type O blood, which of the following blood types could their children possibly have?
A) A and B
B) AB and O
C) A, B, and O
D) A, B, AB, and O
A) A and B
B) AB and O
C) A, B, and O
D) A, B, AB, and O
2 answers:
Answer: A) A and B
Explanation: A woman with type AB blood will have a genotype IAIB while a man with type O blood will have a genotype ii. A cross between the two of them will produce four offsprings: 2 IAi and 2IBi. IAi is type A blood while IBi is type B blood. Therefore the possible blood types of their children are type A and B.
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