I would ignore the crease thing, but if a disease in your family is hereditory then your doctor should certainly be made aware of this and keeping an eye on you. There may be some life style risk factors which triggered the condition in your Mother which you can avoid. It's always a good policy to start these things early.
I would suggest you contact the Cleveland Clinic and address your concerns about the hereditary condition that led to your mother's passing. Often, changes in diet, exercise etc can be a factor in these situations.
Ear lobe creases are simply urban legends, there is no research to confirm this. You should pay attention to the hereditary condition, but ignore the ear crease nonsense.