Pattern baldness, moustanches and beard in human males are examples of :

Options

A. sex differentiating traits
B. sex determining traits
C. sex linked traits
D. sex limited traits

Explanation

To answer the question regarding pattern baldness, moustaches, and beard in human males, we can break down the solution into several steps:

### Step-by-Step Solution:

1. **Identify the Traits**: The traits mentioned in the question are pattern baldness, moustaches, and beard growth in human males.

2. **Determine the Chromosomal Basis**: These traits are influenced by specific chromosomes. In humans, males have one X and one Y chromosome (XY), while females have two X chromosomes (XX).

3. **Classify the Traits**: The traits in question are not simply autosomal traits (traits carried on non-sex chromosomes) but are influenced by the presence of the Y chromosome.

4. **Define Sex-Influenced Traits**: Traits that are expressed differently in males and females, depending on the presence of certain sex chromosomes, are termed sex-influenced traits.

5. **Conclusion**: Therefore, pattern baldness, moustaches, and beard growth are examples of sex-influenced traits because they are typically expressed in males due to the presence of the Y chromosome, which is not present in females.

### Final Answer:
Pattern baldness, moustaches, and beard in human males are examples of **sex-influenced traits**.