Erythroblastosis fetalis is caused:
Correct answer: B. Rh+ man marries to Rh-
- A. Rh- man marries to Rh+
- B. Rh+ man marries to Rh-
- C. Rh- man marries to Rh-
- D. Rh+ man marries to Rh+
Explanation
Erythroblastosis fetalis classically results from Rho(D) incompatibility, which may develop when a woman with Rh-negative blood is impregnated by a man with Rh-positive blood and conceives a fetus with Rh-positive blood, sometimes resulting in hemolysis.
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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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