Evolution of man ( hommosapiens ) and mutation ?

I'm not sure what you mean by "doubt about the evolution of man." If you mean there are some things you don't understand, you're in good company because there a many things not yet understood about the evolution of man. On the other hand, if you mean you doubt that evolution occurred at all, maybe the subject is just too complicated for you and you should believe something simpler and easier to understand, like the story of the talking snake. Many people prefer talking snakes; why not you?