Gregor Mendel demonstrated that traits are passed from parents to offspring independently of one another under all circumstances that he tested. All other genetics researchers have observed this as well. Based on this information, the statement "traits are passed from parents to offspring independently of one another" is

Based on the information shared by the experiments of Gregor Mendel, the statement "traits are passed from parents to offspring independently of one another" is actually a theory and not a hypothesis or observation. It cannot be a hypothesis as it is already tested and proved. Hypothesis is something that has not been proved. An observation is something that has been observed, but never proved. Gregor Mendes proved this theory or hypothesis in the laboratory and so it is surely a theory.