Tyka Nelson, Prince’s only full sister, died at the age of 64 on Nov. 4, her son confirmed. No details were provided by President Nelson (that’s her son’s name), while other members of her family also reported the news. She released four albums between 1988 and 2011 and announced her retirement from music in June. She’d been scheduled to appear at a farewell concert later that month, but it went ahead without her as a result of an unidentified illness. READ MORE: Was Prince’s Famous Rock Hall Guitar Solo an ‘Act of Revenge’? She shared parents with John L. Nelson and Mattie Shaw Nelson with Pr…