What did gregor medel study

Answer: Gregor Mendel definitely did study heredity, as stated by the other answerer, but it is not technically correct. Mendel is the founding father of genetics, so he studied genetics, a branch of biology that he formed.

Explanation: In an experimental botanical garden, Mendel cross-bred pea plants and studied all of their phenotypes and genotypes. Through these studies, he established the rules of heredity and inheritance, which led to the creation of the field of genetics. Thus, he founded and studied genetics.