ABO blood group system was discovered by:
Correct answer: B. Landsteiner
- A. Bernstein
- B. Landsteiner
- C. Karl Correns
- D. Johannsen
Explanation
Karl Landsteiner is the scientist who discovered the ABO blood group system in the early 20th century. His work was pivotal in making blood transfusions safer and more effective by identifying the different blood types. Bernstein later explained the genetic mechanisms behind this blood group system. The other scientists mentioned, Karl Correns and Johannsen, made significant contributions to genetics, but they were not involved in the discovery of the ABO blood group system.
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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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