The word chooser puzzle only had "You like my father". Is the lack of a question mark the only thing that stops this being "Do you like my father"? If so, in speech is the inflection different?
Yes, and yes. It is also common to hear ydych chi'n ...? as the question form as well.
I was given incorrect as i used Dad and not Father, they're the same though right?
You may have made a mistake in another part of the answer, perhaps, or Duo may have had a glitch.