Most of them don't look like Turks who live in Central Asia.
In short, yes.
The slightly longer answer is "and Kurds, and Arabs and Laz and Circassians and Lydians etc."
The Turks assimilated the peoples of Anatolia, some completely, some partially.
[This other question] (https://www.reddit.com/r/AskHistorians/comments/3g9ijs/how_was_anatolia_convertedcleansed_so_easily_by/) has my longer answer.
No, because there are no genetical ethnicities.
They are culturally mostly Turkicized Greeks, Armenians, Arabs, Slavs etc.
Before they were Greeks, Armenians, Arabs, Slavs etc, those peoples were something else and became Amenizised, Greekizised, Arabized, Slavicized etc.
This might be worth crossposting to /r/AskScience.