So, I've been running a ranger with Two Weapon Fighting and the issue keeps coming up about how the Extra Attack ability at level 5 applies. Specifically with regard to ability modifiers.

So, as we understand it, the Ranger gets three melee attacks per turn (two from TWF and one from EA) and two ranged attack (one the normal attack and the second from EA).

The ability modifier would obviously apply to my first ranged attack and also to the two initial melee attacks thanks to TWF. The issue is weather the ability modifier applies to the Extra Attack, ranged or melee.

Do those Extra Attack attacks lose the ability modifier due to being performed as bonus actions, or do they retain them as it's a class ability?