Which of the following traits is transmitted directly from an affected father to only his sons?
Correct answer: C. Y-linked
- A. Autosomal
- B. X-linked
- C. Y-linked
- D. X and Y linked
Explanation
Trait expression and transmission is only in males, the individuals with the Y chromosome. If a male has a trait, so should his father and paternal grandfather as well as his sons and their sons. It follows the inheritance of the Y chromosome.
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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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