In contrast, there are consistent strong genetic similarities in the Y chromosome haplogroup distribution between the southern and northern Chinese population, and the result of principal component analysis indicates almost all Han populations form a tight cluster in their Y chromosome. However, other research has also shown that the paternal lineages Y-DNA O-M119, O-P201, O-P203 and O-M95 are found in both southern Han Chinese and South Chinese minorities, but more commonly in the latter. In fact, these paternal markers are in turn less frequent in northern Han Chinese.
