Biology
Grade-10
Easy
Question
ABO blood groups are an example of which of the following?
- Incomplete dominance
- Co-dominance
- Complete dominance
- None of the above
Hint:
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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