Which one of the following is a sex-linked trait in humans?
Correct answer: C. Haemophilia
- A. Tongue rolling
- B. Baldness
- C. Haemophilia
- D. Skin color
Explanation
Hemophilia is X-linked recessive, affecting mostly males. Tongue rolling and skin color are autosomal traits, while baldness is sex-influenced, not sex-linked.
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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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