[Campbell Biology P.340] The inheritance of the ABO blood group system demonstrates which tw... | Practice Question

The inheritance of the ABO blood group system demonstrates which two genetic principles listed in the summary table?

  • A: Codominance and Pleiotropy
  • B: Incomplete Dominance and Epistasis
  • C: Codominance and Multiple Alleles
  • D: Complete Dominance and Polygenic Inheritance

Explanation

The ABO system involves three alleles IA, IB, and i , which is the definition of multiple alleles. It also demonstrates codominance because in an individual with genotype IAIB, both the A and B carbohydrates are expressed on the surface of red blood cells.