Question

unit 4 - milestone 4
question 5
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which of the following inheritance patterns is exemplified by the abo blood group system?
dominant lethal
recessive lethal
incomplete dominance
codominance
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Explanation:

• Dominant lethal: A mutation that causes death when present in the dominant form. Not relevant to ABO blood groups.
• Recessive lethal: A mutation that causes death when present in the recessive form. Not relevant to ABO blood groups.
• Incomplete dominance: One allele is not completely dominant over the other. Not the case for ABO blood groups.
• Codominance: Both alleles are expressed equally. In the ABO blood group system, if a person has the \(I^A\) and \(I^B\) alleles, they have blood type AB, where both \(A\) and \(B\) antigens are expressed.

Answer:

Codominance