- A Complete dominance of a single allele over all others
- B Incomplete dominance producing a blended intermediate phenotype
- C Co-dominance (A and B) with recessive O
- D Sex linkage carried on the X chromosome
Correct answer: C. Co-dominance (A and B) with recessive O
Explanation: Blood type A and B are codominant (both expressed in AB). O is recessive. Blood type is controlled by multiple alleles (IA, IB, i).
Concept context
Mendel's laws, inheritance patterns, DNA structure, and molecular biology. Core of NEET biology.
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