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Hypertirichosis (hairy pinnae) is trait ...

Hypertirichosis (hairy pinnae) is trait linked to

A

X-chromosome

B

Y-chromosome

C

Autosomes

D

None of the above

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Hypertrichosis**: Hypertrichosis, commonly referred to as "hairy pinnae," is a condition characterized by excessive hair growth on the ears. 2. **Identifying the Genetic Link**: To determine whether this trait is linked to the X chromosome, Y chromosome, autosomes, or none, we need to consider the inheritance patterns of traits associated with hair growth. 3. **Analyzing the Chromosomal Link**: - Traits linked to the X chromosome are often expressed in males and females, but males are more likely to express recessive traits due to having only one X chromosome. - Traits linked to the Y chromosome are typically expressed only in males, as females do not possess a Y chromosome. - Autosomal traits can be expressed in both sexes equally. 4. **Conclusion**: Since hypertrichosis is primarily observed in males and is linked to the Y chromosome, we conclude that hypertrichosis is a Y-linked trait. 5. **Final Answer**: The correct answer is that hypertrichosis (hairy pinnae) is a trait linked to the Y chromosome. ---
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