alleryCodominance is best illustrated by
AMendel's pea height (typical)
Bsnapdragon flower colour
CABO blood group's AB phenotype expressing both A and B antigens
Dalbinism in humans
Answer & Solution
Correct answer: C. ABO blood group's AB phenotype expressing both A and B antigens
1. In codominance both alleles are fully expressed simultaneously in the heterozygote.
2. Individuals with the I^A I^B genotype display both A and B antigens on their red cells (AB blood group).
3. Neither allele is suppressed by the other.
_Source: Maharashtra Balbharati Std XII Biology, Ch 3 "Inheritance and Variation" §3.5_
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