* His Focus: Pasteur's work primarily focused on the nature of infectious diseases and their control. He developed methods for pasteurization, vaccination, and germ theory, revolutionizing public health.
* Genetics Emerged Later: The field of genetics, which studies heredity and the function of genes, emerged later, largely thanks to Gregor Mendel's work in the mid-19th century and the rediscovery of his work in the early 20th century.
* Indirect Influence: While Pasteur didn't directly contribute to genetics, his work in microbiology provided a foundational understanding of the microbial world, which was later crucial to understanding the role of microorganisms in heredity and genetic processes.
In essence, Pasteur's contributions paved the way for the later development of genetics, but he wasn't directly involved in its birth.