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Question: Answered & Verified by Expert
A person having genotype IAIB would show the blood group as AB. This is because
BiologyPrinciples of Inheritance and VariationNEET
Options:
  • A Pleiotropy
  • B Codominance
  • C Incomplete dominance
  • D Lethal effect
Solution:
2559 Upvotes Verified Answer
The correct answer is: Codominance
ABO blood group is controlled by gene I having three alleles IA, IB and I The alleles IA and IBproduces a slightly different form of sugar while allele I does not produces any sugar. Because humans are diploid, each person possesses any two alleles. When IA and IBare present together they both expresses their own types of sugars, this is because of codominance.

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