Dear Jeeva:
If my biology degree is worth anything (the education behind it) then my answer may be valid: no, your negative thoughts can not pass on by your genes, no way.

Your negative thoughts will pass on to your children in other ways and become just as destructive to them as if they were passed on genetically.

So, although you are not likely to ever be a person completely free of negative thoughts, I hope that you will not have children until you have been able, for a good while, to effectively manage your negative thoughts and addictions via insight and skills and practice, practice, practice.

anita