A trait that passes directly from father to son:
Correct answer: B. Maleness
- A. Colour blindness
- B. Maleness
- C. Ichthyosis
- D. Hemophilia
Explanation
Maleness is determined by the presence of a Y chromosome. Fathers pass their Y chromosome to their sons, which determines their maleness. Sons inherit their X chromosomes from their mothers.
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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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