Which of the following characteristics represents Inheritance of blood groups in humans ?
1. Dominance
2. Codominance
3. Multiple allele
4. Incomplete dominance
5. Polygenic inheritance

Options

A. 2,4 and 5
B. 1, 2 and 3
C. 2, 3 and 5
D. 1, 3 and 5

Answer

B

Explanation

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^(0)` of this gene . Allele `I^(A)` and `I^(B)` are dominant over `I^(0)` of this gene . However , when `I^(A)` and `I^(B)` alleles are present together , they show codominance .
Therefore , option (b) is correct .