Location of Sex-Linked Trait Genes
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Question (English)
Genes controlling sex-linked traits are present on:
- Sex-chromosomes ✓ Correct
- Autosomes
- Both sex chromosomes and autosomes
- Mitochondrial DNA
Explanation:
Correct Answer: Sex Chromosomes
From Table 6 in the notes: Genes of sex-linked traits are present on sex chromosomes (X or Y chromosomes).
Gene Location by Trait Type (Table 6 summary)
- Sex-linked: Sex chromosomes (X-linked or Y-linked) ✔
- Sex-influenced: Autosomes
- Sex-limited: Autosomes
X-Linked Examples (from notes)
- Haemophilia (human)
- Colour blindness (human)
- Barred plumage, broodiness, feather growth in poultry
- Cryptorchidism in horses
- White eye in Drosophila
Y-Linked (Holandric) Examples (from notes)
- Hypertrichosis (excess hair on ear pinna) — Father → all sons
- TDF (Testis-Determining Factor)
- Inherited only through male line: Father → Son → Grandson
📚 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.
