Some people are simply better at business than others. Business schools can teach you the concepts of business but true entrepreneurship is likely inherited. Half the millionaires in the US don't have college degrees, so this is a good indication that entrepreneurship is a skill or trait some are fortunate to have.
There are many professions where the people in them are likely to have had a parent in the same profession. Becoming an engineer is one of them. Doctors and lawyers are the same way. The parents show the children what to do. It is no different for business owners. They learn by watching.
I do not believe acting in an entrepreneurial way is something which one inherits. Sure, growing up in the presence of an entrepreneur and being influenced by him/her will shape the way you perform but I do not believe it is a trait that can be inherited genetically. Many children of entrepreneurs are lazy as all heck and countless successful businessmen/women arise from less than enterprising backgrounds.
Any trait can easily be passed between generations. Seeing your parents or grandparents act in entrepreneurial ways would easily rub off on a young person. However, other factors could be involved. Examples could include, education such as business courses. Desperation could also inspire a person to be bold to find ways to be entrepreneurial in order to fix a situation and make money. People are complex and are the sum of many factors in their lives.