My son snores loud, his dad has sleep apnea.is there a chance he has apnea as well?should i have his tonsils/adenoids checked, does these cause snoring?

Yes : Large tonsils & adenoids can cause snoring and eventually lead to sleep apnea. The enlarged adenoids can be caused by infections and/or allergies and since dad suffers from sleep apnea and apples don't fall far from trees it might not be a bad idea to have him evaluated by your pmdand or ent.

Yes: You didn't mention his age, but snoring in children is not normal. Please have his pcp or ENT specialist see him for an examination. This can be a serious problem for children and can affect physical as well as cognitive and behavioral growth.

Yes: Depending on your son's age, i would absolutely get his to your family doctor. He may then possibly be referred to an ENT specialist. Early attention to his problems can hopefully allow him much better health as he gets older. I would also help him avoid become obese, which can further hinder success.