Which of the following is not an atavistic character ?

Options

A. Tail in some babies
B. Enlarged canines
C. Six fingers
D. Dense body hair.

Answer

To determine which of the following is not an atavistic character, we need to understand what atavism means. Atavistic characters are traits that reappear in an individual that were present in their remote ancestors but have been absent in more recent generations.

### Step-by-Step Solution:

1. **Understanding Atavism**: Atavism refers to the reappearance of traits from distant ancestors that have not been seen in recent generations. Examples include features like tails or extra digits.

2. **Analyzing the Options**:
- **Tail in some babies**: This is considered an atavistic character as some humans are born with tails, which are traits seen in distant ancestors.
- **Enlarged canines**: This can also be seen as an atavistic trait since larger canines are reminiscent of our carnivorous ancestors.
- **Six fingers**: This is a condition known as polydactyly, which is not a reappearance of a trait from ancestors but rather a genetic mutation. It does not reflect a trait that has been absent in recent generations.
- **Dense body hair**: This can be considered an atavistic trait as it reflects characteristics of our hairy ancestors.

3. **Identifying the Non-Atavistic Character**: Based on the analysis, the character that does not represent atavism is **six fingers**.

4. **Conclusion**: Therefore, the correct answer is **option C: six fingers**.