An example of codominance is______________?
Correct answer: D. AB' blood group
- A. A' blood group
- B. B' blood group
- C. O' blood group
- D. AB' blood group
Explanation
AB blood group demonstrates codominance because IA and IB alleles are both expressed in the phenotype, producing both A and B antigens on red blood cells. In blood group O, neither A nor B antigen is expressed, and A or B alone does not show codominance. The likely mistake is choosing A because it is a named blood group, without checking whether both alleles are expressed together.
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About Mendel's Laws of Inheritance
Mendelian inheritance explains how alleles separate into gametes and assort during reproduction, producing predictable genotype and phenotype ratios. Questions cover dominance, recessiveness, homozygous and heterozygous conditions, the laws of segregation and independent assortment, monohybrid and dihybrid crosses, test crosses and the limits caused by linked genes.
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