A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of their offsprings?
Correct answer: A. A, B, AB and O
- A. A, B, AB and O
- B. O only
- C. A and B only
- D. A, B and AB only
Explanation
The man has blood group A, thus its genotype can either be IA IA or IA IO. Similarly, the woman can either have IB IB, or IB IO genotype. Thus, their offspring can have any of the blood groups A (IA IA or IA IO), B (IB IB or IB IO), AB (IA IB), or O (IO IO).
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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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