Complex sentence: In human genetics, Haplogroup R1b1b2a1a2c (M167) is a Y-chromosome haplogroup which is a subdivision of haplogroup R1b defined by the presence of the marker M167, also known as SRY2627.
Split into simpler sentences: In human genetics, Haplogroup R1b1b2a1a2c (M167) is a Y-chromosome haplogroup which is a subdivision of haplogroup R1b. This subclade is defined by the presence of the marker M167, also known as SRY2627.