Transmission of Y-Linked Characters
Inheritance of Y-linked character is through-
- Male parent only — Correct Answer
- Female parent only
- Both
- None
Explanation:
Correct Answer: Male parent only
Y-linked traits (Holandric traits) are located solely on the Y chromosome. Since only males (XY) possess a Y chromosome, these traits can only be passed from father to son — exclusively through the male parent.
Y-Linked Inheritance — Key Facts
- Genes located on the Y chromosome only
- Only males carry the Y chromosome → inheritance through male parent only
- Passed from: Father → Son → Grandson (Holandric/Non-criss-cross inheritance)
- Females (XX) cannot carry or transmit Y-linked traits
Examples of Y-Linked (Holandric) Traits
- Hypertrichosis: Excess hair on ear pinna
- TDF (Testis-Determining Factor): Determines male sex
Sex-Linked Traits — Comparison
| Trait Type | Chromosome | Inherited Through | Examples |
|---|---|---|---|
| X-linked | X | Both parents | Haemophilia, Colour blindness |
| Y-linked (Holandric) | Y | Male parent only | Hypertrichosis, TDF |
Why Other Options Are Wrong
- Female parent only → females have no Y chromosome; cannot transmit Y-linked traits
- Both → incorrect; Y chromosome passes only through males
- None → impossible; Y-linked traits do have a transmission route (father to son)
📚 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.
