Annenin bir Türktür mu?

Is your mother a Turk?

Thank you

Noo, you´re making it more complicated than it is

Simply: Annen Türk mü?

sufler thanks

anne (mother)

anne+n--->annen (your mother)

Annen Türk. (Your mother is Turk.)

Annen Türk mü? (Is your mother Turk?)

Annen Türk müdür? (Is your mother Turk?)

-dir is unnecessary here indeed. Because there is no need to generalization or guess. But it is correct grammatically.