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NEET2018ZoologyPrinciples of Inheritance and VariationActual

AB blood group shows

Options

  1. Acodominance
  2. Bincomplete dominance
  3. Cpolygenic inheritance
  4. Dpleiotropy

Correct answer

A. codominance

Step-by-step solution

In humans, AB blood group shows codominance. Here, allele I ^ A for A-type blood is codominant with allele I ^ B for B-type blood. In heterozygotes, I ^ A I ^ B expresses the characteristics of both A and B antigens, i.e. I ^ A I ^ B possess RBCs that carry both A and B antigens at their surface.

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