Erythroblastosis foetalis occurs when:
Correct answer: B. Mother is Rh-negative and the Baby is Rh-positive
- A. Mother is Rh-positive and Baby is Rh-negative
- B. Mother is Rh-negative and the Baby is Rh-positive
- C. Both Mother and Baby are Rh-negative
- D. Both Mother and Baby are Rh-positive
- E. All of the above statements are true
Explanation
When an Rh-negative mother has an Rh-positive child, erythroblastosis fetalis occurs. This can be understood by the fact that the Rh-negative mothers can't recognize Rh antigen so the mixing of the blood during delivery causing an immune response against the fetus' antigen.
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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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