While it's hard to say definitively who was the *first* person to notice patterns in inheritance, Gregor Mendel is widely recognized as the father of genetics for his groundbreaking work in the mid-19th century.

Here's why:

* Systematic Experiments: Mendel conducted meticulous experiments on pea plants, carefully tracking the inheritance of various traits over multiple generations. This was a significant departure from previous observations which were often anecdotal.

* Quantitative Analysis: He analyzed his results mathematically, proposing the concepts of dominant and recessive alleles and the principles of segregation and independent assortment. This provided a framework for understanding inheritance that was previously lacking.

* Scientific Publication: Mendel published his findings in 1866, but they were largely ignored for decades. However, his work was eventually rediscovered and recognized for its profound importance.

While others before Mendel, such as Hippocrates and Aristotle, had theories about inheritance, Mendel was the first to provide a scientifically rigorous and quantitative framework for understanding how traits are passed from one generation to the next. His work laid the foundation for the entire field of genetics.