A man who has type AB blood cannot be the father of a child with type _ blood, because he would pass on either the _ or the B allele to all of his offspring.
Correct answer: B. O,A
- A. A,O
- B. O,A
- C. B,O
- D. B,A
Explanation
The father can pass on either the A or B allele to each of his offspring. Even if the mother has blood type O, the child cannot have blood type O because of the A or B allele received from the father. A and B alleles are dominant over O. For blood type O (the recessive phenotype) to occur, there should be two copies of the O allele, one from each parent. This is impossible in the given situation.
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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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