Moderate

A hemophiliac man receives 'Xh' indirectly from his:

Correct answer: B. Mother's father

  • A. Father's father
  • B. Mother's father
  • C. Grandfather's father
  • D. Grandmother's father

Explanation

Xh is inherited by a male directly from his affected or carrier mother. However, the mother have inherited it from her father or mother. Thus the male will inherit it indirectly from mother's father or mother's mother.

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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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