Complex sentence: M175 is almost nonexistent in Western Siberia, Western Asia, Europe, and Africa and is completely absent from the Americas, although certain subclades of Haplogroup O-M175 do achieve significant frequencies among some populations of South Asia, Central Asia, and Oceania.
Split into simpler sentences: M175 is almost nonexistent in Western Siberia, Western Asia, Europe, and Africa. Notably, certain subclades of Haplogroup O-M175 do achieve significant frequencies among some populations of South Asia, Central Asia, and Oceania.