 Its frequency drops rapidly in central Europe, suggesting that the survivors bearing I2 lineages expanded predominantly through south-eastern and central-eastern Europe.Cinnioglu sees evidence for the existence of an Anatolian refuge, which also harboured Hg R1b1b2.Today, R1b dominates the y chromosome landscape of western Europe, including the British Isles, suggesting that there could have been large population composition changes based on migrations after the LGM.