A person with unknown blood group under ABO system, has suffered much blood loss in an accident and needs immediate bloodtransfusion. His friend who has valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?
Correct answer: C. Type O
- A. Type B
- B. Type AB
- C. Type O
- D. Type A
Explanation
The universal blood donor. People with blood type O are considered universal donors because their blood lacks A or B antigens on the surface of red blood cells. Therefore, type O blood can be transfused to individuals of any blood type without causing an adverse reaction due to antigen incompatibility.
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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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