Location of Genes for Sex-Influenced Traits
Genes of sex-influenced traits are present on:
- Sex-chromosomes
- Autosomes — Correct Answer
- Both
- None of the above
Explanation:
Correct Answer: Autosomes
Genes of sex-influenced traits are present on autosomes. The gene is present in both sexes, but its expression is influenced by the sex hormones — what acts as dominant in one sex may act as recessive in the other.
Classic Examples of Sex-Influenced Traits
- Baldness in humans: The baldness allele is dominant in males (due to testosterone) but recessive in females.
- Polled/horned condition in Dorset sheep: The polled allele is dominant in males but recessive in females.
Remember: sex-influenced ≠ sex-linked. Sex-influenced genes are on autosomes, not sex chromosomes.
📚 About this Topic — Animal Genetics & Breeding
This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.
