A certain road accident patient with an unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
Correct answer: C. Blood group O
- A. Blood group B
- B. Blood group AB
- C. Blood group O
- D. Blood group A
Explanation
(c) : The blood group was O. The person having O blood group is the universal donor. It lacks both antigens 'A' and 'B' and thus does not cause agglutination or clumping of blood cells when transfused into a person with any of the four blood groups.
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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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