▁desc endant ▁branch ▁of ▁ha p lo group ▁O - F 2 6 5 , ▁one ▁of ▁two ▁ext ant ▁primary ▁sub cl ades ▁of ▁H ap lo group ▁O - M 1 7 5 . ▁The ▁same ▁cla de ▁previously ▁has ▁been ▁l abeled ▁as ▁O - MS Y 2 . 2 . ▁ ▁Orig ins ▁The ▁H ap lo group ▁O - M 1 1 9 ▁branch ▁is ▁believed ▁to ▁have ▁evol ved ▁during ▁the ▁Late ▁Ple ist oc ene ▁( Upper ▁Pale ol ith ic ) ▁in ▁China ▁main land . ▁ ▁Pale ol ith ic ▁migr ations ▁A ▁ 2 0 1 0 ▁study ▁by ▁Kar af et ▁suggests ▁ha p lo group ▁O - M 1 1 9 ▁was ▁part ▁of ▁a ▁four - phase ▁colon ization ▁model ▁in ▁which ▁Pale ol ith ic ▁migr ations ▁of ▁h unter - g ather ers ▁sh aped ▁the ▁primary ▁structure ▁of ▁current ▁Y - Ch rom os ome ▁divers ity ▁of ▁Mar itime ▁S out heast ▁Asia . ▁Ne ol ith ic ▁inc urs ions ▁made ▁only ▁a ▁minor ▁impact ▁on ▁the ▁pat ernal ▁gene ▁pool , ▁despite ▁the ▁large ▁cultural ▁impact ▁of ▁the ▁Aust ron esian ▁expansion . ▁Appro xim ately ▁ 5 0 0 0 ▁B CE , ▁H ap lo group ▁O - M 1 1 9 ▁co ales ced ▁at ▁Sund aland ▁and ▁migr ated ▁north wards ▁to ▁as ▁far ▁as ▁Taiwan , ▁where ▁O - M 5 0 ▁constit utes ▁some ▁ 9 0 %