The Anatolians are the ethnic descendants of both the indigenous populations of Asia Minor who converted to Islam (and were thus spared from the genocidal campaign of the Ottomans and Kemalists during the early 20th century), and also of non-indigenous populations from the Balkans, the Middle East, and Central Asia. From Central Asia came the Turks, who were the main agent for the Islamization and during the last century Turkification of Asia Minor.
To what extent are the Anatolians descended from Central Asian Turks? The study of Cinnioglu et al. (2004) discovered an occurrence of 3.4% of Mongoloid Y-chromosomal haplogroups in Anatolia (haplogroups Q, O, and C).
According to Tambets et al. (2004) the occurrence of Mongoloid haplogroups in present-day Central Asian Turkic Altaic speakers (Altaians) is at least 40%, with an additional 10% which might belong to haplogroup O which was not tested in this study. According to Zerjal et al. (2002) this percentage is for various Turkic speakers: Kyrgyz (22%), Dungans (32%), Uyghurs (33%), Kazaks (86%), Uzbeks (18%).
It is clear that the percentage of Mongoloid ancestry among the Turkic speakers is very variable, yet it is clear that the Proto-Turks must have been partially Mongoloid in lieu of the fact that all current Turkic speakers possess some Mongoloid admixture. The average of the six Central Asian population samples listed above is 38.5% and may serve as a first-order estimate of the paternal contribution of early Turks, who (judging by their modern descendants in Central Asia) were more Caucasoid paternally and more Mongoloid maternally.
Using the figure of 38.5%, the paternal contribution of Turks to the Anatolian population is estimated to about 11%. In lieu of the approximation, allowing for 33% relative error in either direction for both the true frequency of Mongoloid lineages in Anatolia and in early Turks, we obtain a range of 6-22%. It would thus appear that the Turkish element is a minority one in the composition of the Anatolians, but it is by no means negligible.