Indirectly it has had a huge effect on your odds of admission. Firstly, the money in your family made it possible for you to spend your time studying (if you chose to) instead of working to pay your way through college. Secondly, legacy does play a role in admission decisions at many schools, so you'll have a better shot at the school your father/grandfather graduated from. Thirdly, it's helped out alot with providing opportunities for you to get loads of shadowing experience, both at your fathers office and at specialists offices. So yes, having parents in the field does play a major role in admission.