Here's why:

* Focus on fundamental knowledge: Pure science seeks to understand the fundamental principles and mechanisms of the natural world. Genetics investigates the inheritance of traits, the structure and function of genes, and the mechanisms of genetic variation. This pursuit of fundamental knowledge aligns with the goals of pure science.

* Emphasis on research and discovery: Genetics relies heavily on research and experimentation to uncover new knowledge about genes, inheritance, and their impact on organisms. This research-driven approach is characteristic of pure science.

* Contribution to other fields: While genetics has practical applications in areas like medicine and agriculture, its core principles and discoveries contribute to our fundamental understanding of life, impacting fields like evolution, biology, and medicine.

While genetics can be applied in practical ways, its foundation lies in the pursuit of knowledge for its own sake, making it a branch of pure science.