| Which of the following characteristics represents 'Inheritance of blood groups' in humans? |
| I. Dominance |
| II. Codominance |
| III. Multiple allele |
| IV. Incomplete dominance |
| V. Polygenic inheritance |
A) I, IV and V
B) I, II and III
C) II, III and V
D) I, III and V
Correct Answer: B
Solution :
[b] Dominance, codominance and multiple alleles are the characteristics that represent 'inheritance of blood groups' in humans. ABO blood groups are determined by the gene I. There are multiple (three) alleles, \[{{I}^{A}}\], \[{{I}^{B}}\] and i of this gene. Alleles \[{{I}^{A}}\]and \[{{I}^{B}}\] are dominant over i. However, when \[{{I}^{A}}\] and \[{{I}^{B}}\]alleles are present together, they show codominance. Therefore, option [b] is correct.
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