Biology
Grade-10
Easy

Question

ABO blood groups are an example of which of the following?

  1. Incomplete dominance
  2. Co-dominance
  3. Complete dominance
  4. None of the above

hintHint:

Co-dominance is exhibited by ABO blood groups.

The correct answer is: Co-dominance


    • In the ABO blood system there are two alleles present namely A and B and both of them are dominant over the recessive allele i.
    • When any one of them is present it expresses itself completely in homozygous condition or with the allele i forming the blood group A and B.
    • When both the alleles are present both express themselves completely. This is called co dominance as in the blood group AB.

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