A child's blood group is 'O'. The parent's blood groups cannot be:
Correct answer: C. AB and O
- A. A and B
- B. A and A
- C. AB and O
- D. B and O
Explanation
O blood group of a child cannot be obtained from the parents having blood group O × AB. The parents blood groups may be A × O, A × B, B × O, B × A, O × A and O × B.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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