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Question
Which of the following is an example of codominance?
Options
Pink flowers of snapdragon
The ABO blood groups in humans
Sex-linkage in humans
None of the above
MCQ
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Solution
The ABO blood groups in humans
Explanation:
Codominance is a genetic scenario where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that shows both traits side by side. In the ABO blood group system, both IA and IB alleles are codominant, so a person with genotype IAIB expresses both A and B antigens, showing blood group AB.
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