A) \[BB\times AA\]
B) \[AB\times AB\]
C) \[BO\times OO\]
D) \[BO\times AO\]
Correct Answer: D
Solution :
Bernstein (1924-1925) discovered that the ABO blood grouping is aninherited characteristic which involve multiple allelism. - Three allelic genes \[{{I}^{a}},\text{ }{{I}^{b}}\]and \[{{I}^{o}}\]control the inheritance of blood groups in human. - Blood group A genotype is \[-\text{ }{{I}^{a}}{{I}^{a\text{ }or}}{{I}^{a}}{{I}^{o}}\] Blood group B genotype is\[-\text{ }{{I}^{b}}{{I}^{b\text{ }or}}{{I}^{b}}{{I}^{o}}\] Blood group AB genotype is\[-\text{ }{{I}^{a~}}{{I}^{b}}\] Blood group O genotype is \[-\text{ }{{I}^{o}}{{I}^{o}}\]| S. No. | Blood Group of Child | One Parent | Second Parent | Cannot Be |
| 1. | O | O A B | A, B and O A, B and O A, B and O | AB AB AB |
| 2. | A | O A B | A and AB A, B and O A, B and O | B and O AB AB |
| 3. | B | A B O | B and AB B and AB B and AB | O and A O and A O and A |
| 4. | AB | A B AB | B and AB A and AB A, B and AB | O and A O and B O |
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